plosive vs labial stop

plosive and labial stop both are nouns.

Word	Noun	Adjective	Verb	Adverb
plosive	Yes	No	No	No
labial stop	Yes	No	No	No

As nouns, labial stop is a hyponym of plosive; that is, labial stop is a word with a more specific, narrower meaning than plosive:

plosive: a consonant produced by stopping the flow of air at some point and suddenly releasing it
labial stop: a stop consonant that is produced with the lips

Other hyponyms of plosive include glottal catch, glottal plosive, glottal stop, click, suction stop.

plosive (noun)	labial stop (noun)
a consonant produced by stopping the flow of air at some point and suddenly releasing it	a stop consonant that is produced with the lips