mop vs pull a face

mop is a noun but pull a face is not a noun.

Word	Noun	Adjective	Verb	Adverb
mop	Yes	No	Yes	No
pull a face	No	No	Yes	No

As verbs, pull a face is a hypernym of mop; that is, pull a face is a word with a broader meaning than mop:

mop: make a sad face and thrust out one's lower lip
pull a face: contort the face to indicate a certain mental or emotional state

Other hypernyms of mop include grimace, make a face.

mop (noun)	pull a face (noun)
cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors

mop (verb)	pull a face (verb)
make a sad face and thrust out one's lower lip	contort the face to indicate a certain mental or emotional state
to wash or wipe with or as if with a mop