[1] : WordNet (r) 2.0

quid pro quo
     n : something for something; that which a party receives or is
         promised in return for something he does or gives or
         promises syn: quid
see also:
quid 

[2] : Moby Thesaurus II by Grady Ward, 1.0

78 moby thesaurus words for "quid pro quo":
   agency, alternation, balance, ballast, battledore and shuttlecock,
   blow for blow, change, coaction, commutation,
   complementary distribution, concurrence, consideration,
   cooperation, counterbalance, counterchange, counterpoise,
   counterweight, cross fire, delegation, deputation, deputyship,
   displacement, engagement, equipoise, equivalent, exchange,
   give-and-take, interaction, interchange, intercommunication,
   intercourse, interlacing, intermeshing, intermutation, interplay,
   intertwining, interweaving, interworking, law of retaliation,
   lex talionis, like for like, makeweight, measure for measure, mesh,
   meshing, mutual admiration, mutual support, mutual transfer,
   mutuality, offset, permutation, power of attorney, reciprocality,
   reciprocation, reciprocity, replacement, representation,
   retaliation, seesaw, setoff, something for something,
   something in return, something of value, subrogation, substitution,
   supersedence, superseding, supersedure, supersession,
   supplantation, supplanting, supplantment, switch, talion,
   tit for tat, transposal, transposition, vicariousness

[3] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

quid pro quo. this phrase signifies verbatim, what for what. it is applied 
to the consideration of a contract. see co. litt. 47, b; 7 mann.  gr. 998. 

Application Pro >> A Words
Application Pro, definition of term: Application Pro
application+pro_pag1.html

Application Pro >> A Words
Application Pro, definition of term: Application Pro
application+pro_pag1.html

Application Pro >> A Words
Application Pro, definition of term: Application Pro
application+pro_pag1.html