The Collaborative International Dictionary of English v.0.48:

Prostitute \Pros"ti*tute\, v. t. [imp. & p. p. Prostituted; p.
   pr. & vb. n. Prostituting.] [L. prostitutus, p. p. of
   prostituere to prostitute; pro before, forth + statuere to
   put, place. See Statute.]
   1. To offer, as a woman, to a lewd use; to give up to
      lewdness for hire. "Do not prostitute thy daughter."
      --Lev. xix. 29.
      [1913 Webster]

   2. To devote to base or unworthy purposes; to give up to low
      or indiscriminate use; as, to prostitute talents; to
      prostitute official powers. --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prostitute \Pros"ti*tute\, a. [L. prostitutus, p. p.]
   Openly given up to lewdness; devoted to base or infamous
   purposes.
   [1913 Webster]

         Made bold by want, and prostitute for bread. --Prior
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prostitute \Pros"ti*tute\, n. [L. prostituta.]
   1. A woman giver to indiscriminate lewdness; a strumpet; a
      harlot.
      [1913 Webster]

   2. A base hireling; a mercenary; one who offers himself to
      infamous employments for hire.
      [1913 Webster]

            No hireling she, no prostitute to praise. --Pope.
      [1913 Webster]

WordNet (r) 3.0 (2006):

prostitute
    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: sell one's body; exchange sex for money

Moby Thesaurus II by Grady Ward, 1.0:

108 Moby Thesaurus words for "prostitute":
   B-girl, Cyprian, Paphian, abuse, adulterate, alloy, bawd, befoul,
   bimbo, brass, call girl, canker, catamite, cheapen, chippy,
   coarsen, cocotte, confound, contaminate, convert, corrupt,
   courtesan, cruiser, daughter of joy, debase, debauch, defalcate,
   defile, deflower, degenerate, degrade, demean, denature, deprave,
   desecrate, despoil, devalue, distort, divert, drab, embezzle,
   erring sister, fallen, fallen woman, fille de joie, foul, harlot,
   hetaera, hooker, hustler, hustling, infect, loose woman, lower,
   maladminister, meretricious, meretrix, misapply, misappropriate,
   misemploy, mishandle, mismanage, misuse, moll, nightwalker, on the,
   on the town, painted woman, pander, pave, peculate, pervert,
   pickup, pilfer, pimp, poison, pollute, poule, pro, procure,
   profane, prostituted, quean, ravage, ravish, scarlet,
   scarlet woman, sell out, stew, streetwalker, streetwalking,
   strumpet, taint, tart, tomato, trollop, trull, twist, ulcerate,
   unfortunate woman, violate, vitiate, vulgarize, warp, white slave,
   whore, whorish, working girl