articulator vs lip

articulator and lip both are nouns.

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

As nouns, lip is a hyponym of articulator; that is, lip is a word with a more specific, narrower meaning than articulator:

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

articulator (noun)	lip (noun)
a movable speech organ	either the outer margin or the inner margin of the aperture of a gastropod's shell
someone who pronounces words	the top edge of a vessel or other container
	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