expire vs pip out

expire and pip out both are verbs.

Word	Noun	Adjective	Verb	Adverb
expire	No	No	Yes	No
pip out	No	No	Yes	No

As verbs, pip out is a hyponym of expire; that is, pip out is a word with a more specific, narrower meaning than expire:

expire: pass from physical life and lose all bodily attributes and functions necessary to sustain life
pip out: be killed or die

Other hyponyms of expire include abort, asphyxiate, stifle, suffocate, buy it, drown, predecease, famish, starve, fall, succumb, yield.

expire (verb)	pip out (verb)
expel air	be killed or die
pass from physical life and lose all bodily attributes and functions necessary to sustain life
lose validity