ebb vs besiege

ebb is a noun but besiege is not a noun.

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

As verbs, besiege is a hypernym of ebb; that is, besiege is a word with a broader meaning than ebb:

ebb: hem in fish with stakes and nets so as to prevent them from going back into the sea with the ebb
besiege: surround so as to force to give up

Other hypernyms of ebb include beleaguer, circumvent, hem in, surround.

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

ebb (verb)	besiege (verb)
fall away or decline	harass, as with questions or requests
hem in fish with stakes and nets so as to prevent them from going back into the sea with the ebb	surround so as to force to give up
flow back or recede	cause to feel distressed or worried