mew vs sea mew

mew and sea mew both are nouns.

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

As nouns, mew and sea mew are synonyms defined as:

mew and sea mew: the common gull of Eurasia and northeastern North America

Other synonyms of mew include Larus canus, mew gull.

mew (noun)	sea mew (noun)
the common gull of Eurasia and northeastern North America	the common gull of Eurasia and northeastern North America
the sound made by a cat (or any sound resembling this)

mew (verb)	sea mew (verb)
cry like a cat
utter a high-pitched cry, as of seagulls