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

Class I. Words Expressing Abstract Relations
Section VIII. Causation
4. Indirect Power

176. Tendency.

   NOUN:TENDENCY; aptness, aptitude; proneness, proclivity, bent, turn, tone, bias, set, warp, leaning (with to or towards), predisposition, inclination, tendence [rare], propensity, susceptibility; conatus, conation [obs.], nisus; liability [See Liability]; quality, nature, temperament; idiocrasy, idiosyncrasy; cast, vein, grain; humor, mood; trend; drift (direction) [See Direction]; conduciveness, conducement; applicability (utility) [See Utility]; subservience (instrumentality) [See Instrumentality].
   VERB:TEND, contribute, conduce, lead, influence, dispose, incline, verge, bend to, warp, turn, work towards, trend, affect, carry, redound to, bid fair to, gravitate towards; promote (aid) [See Aid].
   ADJECTIVE:TENDING &c. v.; conative, conducent [obs.], conducive, working towards, in a fair way to, likely to, calculated to; liable [See Liability]; subservient (instrumental) [See Instrumentality]; useful [See Utility]; subsidiary (helping) [See Aid]; idiocratic, indiosyncratic, idiosyncratical.
   ADVERB:for, whither; for the purpose of.
   QUOTATION:All men that are ruined are ruined on the side of their natural propensities.—Burke