drop dead vs abort

drop dead is not a noun while abort is a noun.

Word	Noun	Adjective	Verb	Adverb
drop dead	No	No	Yes	No
abort	Yes	No	Yes	No

As verbs, abort is a hyponym of drop dead; that is, abort is a word with a more specific, narrower meaning than drop dead:

drop dead: pass from physical life and lose all bodily attributes and functions necessary to sustain life
abort: cease development, die, and be aborted

Other hyponyms of drop dead include asphyxiate, stifle, suffocate, buy it, pip out, drown, predecease, famish, starve, fall, succumb, yield.

drop dead (noun)	abort (noun)
	the act of terminating a project or procedure before it is completed

drop dead (verb)	abort (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	terminate a pregnancy by undergoing an abortion
	cease development, die, and be aborted
	terminate before completion