buy it vs cant

buy it is not a noun while cant is a noun.

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

buy it (noun)	cant (noun)
	two surfaces meeting at an angle different from 90 degrees
	a characteristic language of a particular group (as among thieves)
	stock phrases that have become nonsense through endless repetition
	insincere talk about religion or morals
	a slope in the turn of a road or track; the outside is higher than the inside in order to reduce the effects of centrifugal force

buy it (verb)	cant (verb)
be killed or die	heel over