Words with dundant or fluous fixes

Words that aren’t opposites

  • real — unreal
  • canny — uncanny
  • valuable — invaluable
  • credulous — incredulous
  • fact — fiction (this is actually a deep one. Roots of both are in proto-indo-european words for “to make”)
  • mure — demure
  • vert — invert
  • aging — imaging
  • pact — impact
  • mediate — immediate
  • predate — postdate
  • toward — untoward

Prefixed words that aren’t words and don’t have prefixes. Some of these are words that aren’t opposites because one of them isn’t a word.

  • ert — inert
  • molish — demolish
  • venient — convenient
  • dundant — redundant
  • fluous — superfluous
  • becile — imbecile
  • agining — imagining
  • plicate — replicate
  • gruntled — disgruntled
  • sidious — insidious
  • whelmed — overwhelmed
  • rageous — outrageous
  • cursion — recursion
  • imburse — reimburse
  • burse — reimburse
  • fluous — superfluous
  • cilious — supercilious
  • quited — requited
  • quited — unrequited
  • vagant — extravagant
  • bolé — hyperbole
  • bolic — hyperbolic

Also, words with redundant prefixes, and

  • reiterate — iterate
  • concatenate — catenate
  • intercatenate — catenate
  • encompass — compass
  • eminant — preeminant

Other fixed words whose meanings don’t correspond to those of their bases

  • irrespective
  • consummate
  • insure
  • ensure
  • fulsome

This post was formerly “Words that aren’t opposites,” but it’s bigger now. Obviously, there’s room for more.

See also, islands that don’t exist, and list of fictional guidebooks.