littoral zone vs litoral

littoral zone and litoral both are nouns.

Word	Noun	Adjective	Verb	Adverb
littoral zone	Yes	No	No	No
litoral	Yes	No	No	No

As nouns, littoral zone and litoral are synonyms defined as:

littoral zone and litoral: the region of the shore of a lake or sea or ocean

Other synonyms of littoral zone include littoral, sands.

littoral zone (noun)	litoral (noun)
the region of the shore of a lake or sea or ocean	the region of the shore of a lake or sea or ocean