flutter vs motility

flutter and motility both are nouns.

Word	Noun	Adjective	Verb	Adverb
flutter	Yes	No	Yes	No
motility	Yes	No	No	No

As nouns, motility is a hypernym of flutter; that is, motility is a word with a broader meaning than flutter:

Other hypernyms of flutter include motion, move, movement.

flutter (noun)	motility (noun)
the act of moving back and forth	a change of position that does not entail a change of location
the motion made by flapping up and down	ability to move spontaneously and independently
abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block
a disorderly outburst or tumult

flutter (verb)	motility (verb)
wink briefly
beat rapidly
move back and forth very rapidly
move along rapidly and lightly; skim or dart
flap the wings rapidly or fly with flapping movements