pass away vs abort

pass away is not a noun while abort is a noun.

Word	Noun	Adjective	Verb	Adverb
pass away	No	No	Yes	No
abort	Yes	No	Yes	No

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

pass away: 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 pass away include asphyxiate, stifle, suffocate, buy it, pip out, drown, predecease, famish, starve, fall, succumb, yield.

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

pass away (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
go out of existence	cease development, die, and be aborted
	terminate before completion