Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section IV. Antagonism
2. Active Antagonism

708. Opposition.

   NOUN:OPPOSITION, antagonism; oppugnancy, oppugnation [rare]; impugnation, impugnment, contrariousness [rare], contrariness, contrariety; contravention; counteraction [See Counteraction]; counterplot.
  resistance [See Resistance]; restraint [See Restraint]; hindrance [See Hindrance]; absence of aid [See Aid].
  cross fire, cross current, undercurrent, head wind.
  CLASHING, collision, conflict, discord, want of harmony; filibuster [U. S.], filibusterism.
  COMPETITION, two of a trade, rivalry, emulation, race, contest; tug of war.
   VERB:OPPOSE, counteract, run counter to; withstand (resist) [See Resistance]; control (restrain) [See Restraint]; hinder [See Hindrance]; antagonize, oppugn, fly in the face of, go dead against, kick against, cross, kick at, fall out with, fall foul of; set -, pit- against; face, confront, cope with; make a -stand, – dead set- against; set -oneself, – one’s face- against; protest -, vote -, raise one’s voice- against; disfavor, turn one’s back upon; set at naught, slap in the face, slam the door in one’s face.
  THWART, be -, play- at cross-purposes; counterwork, countermine; over-thwart.
  ENCOUNTER, stem, breast; stem -, breast- the -tide, – current, – flood; buffet the waves; beat up against, make head against; grapple with; kick against the pricks (resist) [See Resistance]; contend with or against [See Contention]; do battle with or against (warfare) [See Warfare].
  CONTRADICT, contravene; belie; go -, run -, beat -, militate- against; come in conflict with.
  COMPETE, emulate &c., 720; rival, spoil one’s trade, force out, drive one out of business.
   ADJECTIVE:OPPOSING, opposed &c. v.; adverse, antagonistic, oppugnant, overthwart; contrary [See Contrariety]; at variance [See Disagreement]; at issue, at war with, in controversy with, in opposition; “agin’ the government.”
  in hostile array, front to front, with crossed bayonets, at daggers drawn; up in arms; resistant [See Resistance].
  UNFAVORABLE, unpropitious, unfriendly, hostile, inimical, cross; filibusterous.
  COMPETITIVE, emulous, cut-throat; in rivalry with, in friendly rivalry.
   ADVERB:AGAINST, versus [L.], counter to, in conflict with, at cross-purposes, cross, contrariwise, unfavorably.
  against the -grain, – current, – stream, – wind, – tide; with a head- wind; with the wind -ahead, – in one’s teeth.
  IN SPITE, in despite, in defiance; in the -way, – teeth, – face- of; across; athwart, overthwart; where the shoe pinches; in one’s teeth.
  THOUGH [See Compensation]; even; quand même [F.]; per contra [L.].
  1. Nitor in adversum.
  2. Take arms against a sea of troubles, And by opposing end them.—Hamlet
  3. I have no words, My voice is in my sword.—Macbeth