lip vs articulator

lip and articulator both are nouns.

Word	Noun	Adjective	Verb	Adverb
lip	Yes	No	No	No
articulator	Yes	No	No	No

As nouns, articulator is a hypernym of lip; that is, articulator is a word with a broader meaning than lip:

lip: either of two fleshy folds of tissue that surround the mouth and play a role in speaking
articulator: a movable speech organ

Other hypernyms of lip include external body part.

lip (noun)	articulator (noun)
either the outer margin or the inner margin of the aperture of a gastropod's shell	a movable speech organ
the top edge of a vessel or other container	someone who pronounces words
either of two fleshy folds of tissue that surround the mouth and play a role in speaking
an impudent or insolent rejoinder
(botany) either of the two parts of a bilabiate corolla or calyx