neap vs neap tide

neap and neap tide both are nouns.

Word	Noun	Adjective	Verb	Adverb
neap	Yes	No	No	No
neap tide	Yes	No	No	No

As nouns, neap and neap tide are synonyms defined as:

neap and neap tide: a less than average tide occurring at the first and third quarters of the moon

neap (noun)	neap tide (noun)
a less than average tide occurring at the first and third quarters of the moon	a less than average tide occurring at the first and third quarters of the moon