mew vs gull

mew and gull both are nouns.

Word	Noun	Adjective	Verb	Adverb
mew	Yes	No	Yes	No
gull	Yes	No	Yes	No

As nouns, gull is a hypernym of mew; that is, gull is a word with a broader meaning than mew:

Other hypernyms of mew include sea gull, seagull.

mew (noun)	gull (noun)
the common gull of Eurasia and northeastern North America	mostly white aquatic bird having long pointed wings and short legs
the sound made by a cat (or any sound resembling this)	a person who is gullible and easy to take advantage of

mew (verb)	gull (verb)
cry like a cat	fool or hoax
utter a high-pitched cry, as of seagulls	make a fool or dupe of