To exist in large numbers or amounts; to be richly supplied with something; to be plentiful — the state-of-abundance word; from Latin abundare (to overflow — ab-, away + undare, to surge in waves, from unda, a wave); describes a condition of plentiful existence rather than a dynamic process; typically used with in (“the region abounds in wildlife”) or with (“the text abounds with examples”).

Abound is the state-of-abundance verb — the most static of the five growth words, describing not a process of growing but a condition of being plentifully present. The word comes from the Latin abundare (to overflow — the image of waves surging beyond their boundary), and it describes the condition of overflowing richness: a place where wildlife abounds has wildlife in such quantities that they overflow the available space; a text that abounds in examples has examples so numerous that they overflow the argument. Unlike flourish and burgeon (which describe dynamic processes of growing and developing), abound describes a state — things simply abound; they are there in abundance, richly present. The construction “abounds in X” or “abounds with X” is characteristic, and the word often appears without a specific object: “opportunities abound” simply means opportunities are plentiful.

“The estuary abounded in birdlife during the winter months — the mudflats and shallow channels supporting populations of waders, wildfowl, and raptors whose density and variety made the area one of the most significant wetland habitats in the region, attracting researchers and birdwatchers from considerable distances during the peak migration season.”

To grow or develop in a healthy, vigorous way; to thrive — the holistic-thriving word; from Latin florere (to flower); the most unambiguously positive of the five growth words; implies not merely growth but the ideal growth of something in conditions that suit it perfectly — the way a flower blooms in the right soil and light.

Flourish is the holistic-thriving verb — the most positive and comprehensive of the five growth words. The word comes from the Latin florere (to flower), and it carries the image of a plant in full flower: not merely alive, not merely growing, but blooming with the full vitality of a thing in its ideal conditions. The flourishing community is not merely growing in population but thriving in every dimension — culturally, economically, socially; the flourishing species is not merely surviving but expanding vigorously in an environment that suits it perfectly. Unlike proliferate (which emphasises numerical increase and can be neutral to negative) and burgeon (which emphasises the explosive energy of early emergence), flourish emphasises the quality and sustainability of the growth: what flourishes does so because conditions support it, and it grows as it was meant to grow.

“The arts had flourished in the city during the decades when industrial wealth had given its merchant class both the means and the aspiration to patronise painters, musicians, and architects — a combination of private prosperity, civic ambition, and genuine aesthetic engagement that had created the conditions for the most concentrated period of cultural production in the region’s history.”

To bear fruit; to become productive or fruitful; to produce the results or benefits that were intended or invested — the bear-fruit/produce-results word; from Latin fructus (fruit) + facere (to make); formal and literary in register; applies literally (a tree fructifies) and figuratively (an investment, a plan, or an effort fructifies).

Fructify is the bear-fruit/produce-results verb — the most formal and distinctively figurative of the five, describing growth specifically as the production of results or yield. The word comes from the Latin fructus (fruit — the product of cultivation, the yield) + facere (to make), and it describes the moment when cultivation, investment, or effort produces its intended outcome: the fructifying economy is one in which investment produces returns; the fructifying policy is one that has finally produced the social results it was designed to achieve; the fructifying relationship is one in which the mutual investment of time and trust produces genuine outcomes. Unlike flourish (which describes the quality of healthy growth) and proliferate (which describes rapid numerical increase), fructify is specifically about production — the bearing of fruit, the yielding of results. It is the most formal word in this set and carries a slightly archaic, literary quality that makes it particularly common in GRE-level reading passages.

“The partnership between the research institute and the manufacturing consortium had taken nearly a decade to fructify — the early years marked by the kind of mutual misunderstanding and organisational friction that typically attends the marriage of academic and industrial cultures, the middle years by patient relationship-building and incremental progress, and the later years by the succession of product innovations and licensing arrangements that finally justified the sustained investment of both parties.”

To increase rapidly in number; to multiply and spread quickly — the rapid-numerical-multiplication word; from Latin proles (offspring — the same root as prolific) + ferre (to bear); neutral in register but frequently used when what is multiplying is unwanted, excessive, or concerning; emphasises speed and quantity of increase rather than quality or desirability.

Proliferate is the rapid-numerical-multiplication verb — the growth word most focused on speed and quantity of increase, and the one most frequently applied to things whose multiplication is neutral, concerning, or unwanted. The word comes from the Latin proles (offspring, the next generation — the same root that gives us prolific, producing abundantly) + ferre (to bear, to produce), and it describes growth through reproduction and spread: the proliferating population multiplies rapidly; the proliferating regulations multiply faster than organisations can track them; the proliferating weapons make the situation more dangerous. Unlike flourish (which is unambiguously positive — growth of quality in ideal conditions) and fructify (which implies the intended production of results), proliferate is neutral to negative — it describes quantity without implying quality, and it is most naturally applied to things that multiply at a rate that outpaces management or control.

“Discount retailers had proliferated across the retail landscape so rapidly in the five years following the financial crisis that the shift in consumer behaviour they had initially been seen as reflecting had come to look, to industry analysts, more like a structural change that those retailers were now actively driving — each new store creating its own gravitational pull on spending patterns in its catchment area.”

To begin to grow or increase rapidly; to emerge and expand vigorously — the budding/early-rapid-growth word; from Old French burjoner (to bud — from burjon, a bud); captures specifically the moment and period of rapid early growth; the emergence that is explosive precisely because it represents potential becoming reality; distinct from established, sustained growth.

Burgeon is the budding/early-rapid-growth verb — the most energetically charged of the five, capturing the specific quality of growth at its explosive beginning. The word comes from the Old French burjoner (to bud — from burjon, a bud), and the botanical image is precise: burgeoning growth is bud-growth, the moment when what was contained in potential suddenly pushes through and expands rapidly into the available space. Unlike flourish (which describes established, sustained, healthy growth over time) and proliferate (which describes rapid numerical increase of existing things), burgeon specifically captures early-phase explosive growth — the sector that is burgeoning has not yet reached maturity but is expanding rapidly from a small base; the burgeoning relationship has the energy of early development rather than the depth of long establishment. The word carries an inherent sense of vitality and forward momentum that makes it more positive in connotation than proliferate but more dynamic and energetic than the sustained flourish.

“The market for plant-based proteins had burgeoned so rapidly in the three years since the first major product launches that the category, which had been a niche concern at the start of the period, now commanded dedicated shelf space in every major supermarket chain, attracted investment from the largest conventional food manufacturers, and supported a secondary ecosystem of specialist ingredient suppliers, logistics providers, and marketing agencies — a growth trajectory that had outpaced the most optimistic projections made at the category’s inception.”