kittiwake vs gull

kittiwake and gull both are nouns.

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

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

kittiwake: small pearl-grey gull of northern regions; nests on cliffs and has a rudimentary hind toe
gull: mostly white aquatic bird having long pointed wings and short legs

Other hypernyms of kittiwake include sea gull, seagull.

kittiwake (noun)	gull (noun)
small pearl-grey gull of northern regions; nests on cliffs and has a rudimentary hind toe	mostly white aquatic bird having long pointed wings and short legs
	a person who is gullible and easy to take advantage of

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