cant vs drop-dead

cant is a noun but drop-dead is not a noun.

Word	Noun	Adjective	Verb	Adverb
cant	Yes	No	Yes	No
drop-dead	No	No	No	Yes

cant (noun)	drop-dead (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

cant (verb)	drop-dead (verb)
heel over

cant (adverb)	drop-dead (adverb)
	stunningly or breathtakingly