ananas vs pineapple

ananas and pineapple both are nouns.

Word	Noun	Adjective	Verb	Adverb
ananas	Yes	No	No	No
pineapple	Yes	No	No	No

As nouns, ananas and pineapple are synonyms defined as:

ananas and pineapple: large sweet fleshy tropical fruit with a terminal tuft of stiff leaves; widely cultivated

ananas (noun)	pineapple (noun)
large sweet fleshy tropical fruit with a terminal tuft of stiff leaves; widely cultivated	large sweet fleshy tropical fruit with a terminal tuft of stiff leaves; widely cultivated
	a tropical American plant bearing a large fleshy edible fruit with a terminal tuft of stiff leaves; widely cultivated in the tropics