bilabial vs labial consonant

bilabial and labial consonant both are nouns.

Word	Noun	Adjective	Verb	Adverb
bilabial	Yes	Yes	No	No
labial consonant	Yes	No	No	No

As nouns, labial consonant is a hypernym of bilabial; that is, labial consonant is a word with a broader meaning than bilabial:

bilabial: a consonant that is articulated using both lips; /p/ or /b/ or /w/
labial consonant: a consonant whose articulation involves movement of the lips

Other hypernyms of bilabial include labial.

bilabial (noun)	labial consonant (noun)
a consonant that is articulated using both lips; /p/ or /b/ or /w/	a consonant whose articulation involves movement of the lips

bilabial (adjective)	labial consonant (adjective)
of or relating to or being a speech sound that is articulated using both lips