preen gland vs bird

preen gland and bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
preen gland	Yes	No	No	No
bird	Yes	No	Yes	No

preen gland (noun)	bird (noun)
oil-secreting gland situated at the base of the tail in most birds	warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
	badminton equipment consisting of a ball of cork or rubber with a crown of feathers
	a cry or noise made to express displeasure or contempt
	the flesh of a bird or fowl (wild or domestic) used as food
	informal terms for a (young) woman

preen gland (verb)	bird (verb)
	watch and study birds in their natural habitat