laughing gull vs gull

laughing gull and gull both are nouns.

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

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

Other hypernyms of laughing gull include sea gull, seagull.

laughing gull (noun)	gull (noun)
small black-headed European gull	mostly white aquatic bird having long pointed wings and short legs
	a person who is gullible and easy to take advantage of

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