The Collaborative International Dictionary of English v.0.48:

Whore \Whore\ (h[=o]r), n. [OE. hore, AS. h[=o]re; akin to D.
   hoer, hoere, G. hure, OHG. huora, huorra, Icel. h[=o]ra, Dan.
   hore, Sw. hora, Goth. h[=o]rs an adulterer, AS. h[=o]r
   adultery, OHG. huor, and probably to L. carus dear. Cf.
   Charity.]
   A woman who practices unlawful sexual commerce with men,
   especially one who prostitutes her body for hire; a
   prostitute; a harlot. --Wyclif.
   [1913 Webster]

   Syn: Harlot; courtesan; prostitute; strumpet.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Whore \Whore\, v. i. [imp. & p. p. Whored; p. pr. & vb. n.
   Whoring.] [Cf. Icel. h?ra. See Whore, n.]
   [1913 Webster]
   1. To have unlawful sexual intercourse; to practice lewdness.
      [1913 Webster]

   2. (Script.) To worship false and impure gods.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Whore \Whore\, v. t.
   To corrupt by lewd intercourse; to make a whore of; to
   debauch. [R.] --Congreve.
   [1913 Webster]

WordNet (r) 3.0 (2006):

whore
    n 1: a woman who engages in sexual intercourse for money [syn:
         prostitute, cocotte, whore, harlot, bawd, tart,
         cyprian, fancy woman, working girl, sporting lady,
         lady of pleasure, woman of the street]
    v 1: work as a prostitute
    2: have unlawful sex with a whore
    3: compromise oneself for money or other gains; "She whored
       herself to Hollywood"

Moby Thesaurus II by Grady Ward, 1.0:

98 Moby Thesaurus words for "whore":
   B-girl, Cyprian, Jezebel, Paphian, backslider, bad egg, bad lot,
   bad woman, baggage, bawd, be promiscuous, bitch, black sheep,
   broad, call girl, chase women, chippy, clitoromaniac, cocotte,
   commit adultery, coquette, courtesan, daughter of joy, debauch,
   degenerate, demimondaine, demimonde, demirep, dissipate, drab,
   easy lay, easy woman, erring sister, fallen angel, fallen woman,
   fancy woman, fille de joie, flirt, floozy, fornicate, frail sister,
   gold digger, grisette, grovel, harlot, harridan, hetaera, hooker,
   hussy, hustler, hysteromaniac, jade, kept woman, lecher,
   loose woman, lost sheep, lost soul, meretrix, miscreant, moll,
   nightwalker, nymphet, nympho, nymphomaniac, painted woman, paphian,
   pervert, philander, pickup, pimp, poule, profligate, prostitute,
   quean, rake, recidivist, recreant, reprobate, scapegrace,
   scarlet woman, sleep around, slut, sorry lot, stew, streetwalker,
   strumpet, swing, tart, trollop, trull, unfortunate woman,
   uteromaniac, vamp, wallow, wanton, wench, white slave, womanize