Nouns

(n)contracta binding agreement between two or more persons that is enforceable by law
(n)contract, declaration(contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make
(n)contract, contract bridgea variety of bridge in which the bidder receives points toward game only for the number of tricks they bid

Verbs

(v)contract, undertakeenter into a contractual arrangement
(v)sign, contract, sign on, sign upengage by written agreement“They signed two new pitchers for the next season”
(v)compress, constrict, squeeze, compact, contract, presssqueeze or press together“she compressed her lips”, “the spasm contracted the muscle”
(v)contract, take, getbe stricken by an illness, fall victim to an illness“He got AIDS”, “She came down with pneumonia”, “She took a chill”
(v)shrink, contractbecome smaller or draw together“The fabric shrank”, “The balloon shrank”
(v)contractcause to be smaller“The heat contracted the woollen garment”
(v)condense, concentrate, contractcompress or concentrate“Congress condensed the three-year plan into a six-month plan”
(v)narrow, contractmake or become more narrow or restricted“The selection was narrowed”, “The road narrowed”
(v)abridge, foreshorten, abbreviate, shorten, cut, contract, reducereduce in scope while retaining essential elements“The manuscript must be shortened”