exit vs buy it

exit is a noun but buy it is not a noun.

Word	Noun	Adjective	Verb	Adverb
exit	Yes	No	Yes	No
buy it	No	No	Yes	No

As verbs, buy it is a hyponym of exit; that is, buy it is a word with a more specific, narrower meaning than exit:

exit: pass from physical life and lose all bodily attributes and functions necessary to sustain life
buy it: be killed or die

Other hyponyms of exit include abort, asphyxiate, stifle, suffocate, pip out, drown, predecease, famish, starve, fall, succumb, yield.

exit (noun)	buy it (noun)
the act of going out
an opening that permits escape or release
euphemistic expressions for death

exit (verb)	buy it (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	be killed or die
lose the lead
move out of or depart from