gull vs sea gull

gull and sea gull both are nouns.

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

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

gull and sea gull: mostly white aquatic bird having long pointed wings and short legs

Other synonyms of gull include seagull.

gull (noun)	sea gull (noun)
mostly white aquatic bird having long pointed wings and short legs	mostly white aquatic bird having long pointed wings and short legs
a person who is gullible and easy to take advantage of

gull (verb)	sea gull (verb)
fool or hoax
make a fool or dupe of