ebb vs wane

ebb and wane both are nouns.

Word	Noun	Adjective	Verb	Adverb
ebb	Yes	No	Yes	No
wane	Yes	No	Yes	No

As nouns, ebb and wane are synonyms defined as:

ebb and wane: a gradual decline (in size or strength or power or number)

Other synonyms of ebb include ebbing.

ebb (noun)	wane (noun)
the outward flow of the tide	a gradual decline (in size or strength or power or number)
a gradual decline (in size or strength or power or number)

ebb (verb)	wane (verb)
fall away or decline	become smaller
hem in fish with stakes and nets so as to prevent them from going back into the sea with the ebb	decrease in phase
flow back or recede	grow smaller