plant part vs lip

plant part and lip both are nouns.

Word	Noun	Adjective	Verb	Adverb
plant part	Yes	No	No	No
lip	Yes	No	No	No

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

plant part (noun)	lip (noun)
any part of a plant or fungus	either the outer margin or the inner margin of the aperture of a gastropod's shell
	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