Abundant and redundant share a rhyme and a Latin river, and part company on welcome. Abundant means plentiful — more than enough, happily: abundant evidence, abundant harvests. Redundant means surplus to need — unneeded, duplicating what is already there: redundant wording, a role made redundant. Abundance is wealth; redundancy is excess. The harvest is abundant; the third copy of the report is redundant.
Both words picture overflowing water: Latin undare, 'to surge in waves' (unda, a wave), gives abundare — 'to overflow', plenty spilling past the brim — and redundare — 'to surge back', the overflow you did not need. That shared river explains the rhyme and sets the split: abundant celebrates the surplus, redundant regrets it. English then handed redundant two special careers — the British workplace sense (a post abolished, its holder made redundant) and the engineer's backup (a redundant system that saves the aircraft) — while abundant kept simply meaning rich supply.
abundant
Abundant means there is more than enough — the Latin abundare pictures water 'overflowing' a vessel. An abundant harvest fills every barn, abundant evidence leaves no room for doubt, abundant wildlife crowds a healthy reef. The word carries a quiet generosity: where something is abundant, no one has to compete for it, which is precisely what makes it the opposite of scarce. Abundance can be squandered, too — the richest fisheries are the ones we deplete first.
redundant
Redundant describes what the system would not miss: the phrase that repeats the sentence, the step that duplicates another, the role made unnecessary by a machine. In British English it is the standard word for losing a job — workers are 'made redundant' when the position, not the person, is abolished. Engineering quietly redeems the word: a redundant system is the deliberate backup that saves the aircraft when the primary fails. Whether redundancy is waste or wisdom depends entirely on what is at stake.
| abundant | redundant | |
|---|---|---|
| Meaning | plentiful; more than enough | surplus to need; unneeded, duplicative |
| Welcome? | yes — plenty as blessing | no — excess as waste (with one exception) |
| Shared river | abundare: overflow the brim | redundare: surge back, over again |
| Classic company | evidence, resources, wildlife | wording, steps, roles |
| Special careers | abundantly clear (fixed phrase) | made redundant (UK jobs); redundant systems (backup) |
| Nouns | abundance | redundancy |
The bottomless jug and the released balloon. Abundance is the cup filled past the brim by a jug with no bottom — more than anyone requested, and nobody in charge of stopping: plenty, celebrated. Redundancy is the twin node drifting away while the signal crosses unharmed — the part whose absence changes nothing. Both overflow; the difference is the verdict. If the surplus enriches, abundant. If the system would never miss it, redundant — which is why editors cut redundant words and count abundant evidence.
abundant
- iThe valley has abundant groundwater even in dry years.
- iiCheap energy was abundant enough to reshape the whole region.
- iiiThe study draws on abundant archival material.
redundant
- iThe final clause is redundant — the second sentence already says it.
- iiAutomation made whole categories of clerical work redundant.
- iiiEach pump has a redundant twin that cuts in on failure.
Redundant's two special senses reward precision. In British English it is the standard word for job loss where the post, not the person, is abolished: made redundant, redundancy payments — IELTS listening territory. In engineering the word turns complimentary: a redundant system is the deliberate backup that saves the aircraft, excess by design. Abundant keeps one fixed phrase worth owning — abundantly clear — and its true antonym battle (with scarce) has its own page on this site.