contract vs strangle

contract is a noun but strangle is not a noun.

Word	Noun	Adjective	Verb	Adverb
contract	Yes	No	Yes	No
strangle	No	No	Yes	No

As verbs, strangle is a hyponym of contract; that is, strangle is a word with a more specific, narrower meaning than contract:

Other hyponyms of contract include choke, prim, astringe, strangulate, convulse, convulse, bear down, overbear, choke, fret, gag, choke, scrag.

contract (noun)	strangle (noun)
a variety of bridge in which the bidder receives points toward game only for the number of tricks he bid
a binding agreement between two or more persons that is enforceable by law
(contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make

contract (verb)	strangle (verb)
be stricken by an illness, fall victim to an illness	constrict (someone's) throat and keep from breathing
make or become more narrow or restricted	struggle for breath; have insufficient oxygen intake
become smaller or draw together	prevent the progress or free movement of
reduce in scope while retaining essential elements	die from strangulation
compress or concentrate	kill by squeezing the throat of so as to cut off the air
enter into a contractual arrangement	suppress in order to conceal or hide
make smaller
squeeze or press together
engage by written agreement