lagune vs lagoon

lagune and lagoon both are nouns.

Word	Noun	Adjective	Verb	Adverb
lagune	Yes	No	No	No
lagoon	Yes	No	No	No

As nouns, lagune and lagoon are synonyms defined as:

lagune and lagoon: a body of water cut off from a larger body by a reef of sand or coral

Other synonyms of lagune include laguna.

lagune (noun)	lagoon (noun)
a body of water cut off from a larger body by a reef of sand or coral	a body of water cut off from a larger body by a reef of sand or coral