simile

simile
    n 1: a figure of speech that expresses a resemblance between
         things of different kinds (usually formed with `like' or
         `as')
    

Simile \Sim"i*le\, n.; pl. {Similes}. [L., from similis. See
   {Similar}.] (Rhet.)
   A word or phrase by which anything is likened, in one or more
   of its aspects, to something else; a similitude; a poetical
   or imaginative comparison.
   [1913 Webster]

         A good swift simile, but something currish. --Shak.
   [1913 Webster]
    

105 Moby Thesaurus words for "simile":
      accordance, affinity, agreement, alikeness, allegory, alliance,
      alliteration, allusion, anacoluthon, anadiplosis, analogy,
      anaphora, anastrophe, antiphrasis, antithesis, antonomasia, aping,
      apophasis, aporia, aposiopesis, apostrophe, approach,
      approximation, assimilation, balancing, catachresis, chiasmus,
      circumlocution, climax, closeness, community, comparability,
      comparative anatomy, comparative degree, comparative grammar,
      comparative judgment, comparative linguistics,
      comparative literature, comparative method, compare, comparing,
      comparison, conformity, confrontation, confrontment, contrast,
      contrastiveness, conversion, copying, correlation, correspondence,
      distinction, distinctiveness, ecphonesis, emphasis, exclamation,
      gemination, hypallage, hyperbaton, hyperbole, identity, imitation,
      inversion, irony, likeness, likening, litotes, malapropism,
      matching, meiosis, metaphor, metonymy, mimicking, nearness,
      onomatopoeia, opposing, opposition, oxymoron, parallelism,
      paregmenon, parenthesis, parity, periphrasis, personification,
      pleonasm, preterition, prolepsis, proportion, regression, relation,
      repetition, resemblance, sameness, sarcasm, semblance, similarity,
      similitude, simulation, spoonerism, syllepsis, symploce,
      synecdoche, trope of comparison, weighing, zeugma