besiege vs ebb

besiege is not a noun while ebb is a noun.

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

As verbs, ebb is a hyponym of besiege; that is, ebb is a word with a more specific, narrower meaning than besiege:

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

Other hyponyms of besiege include blockade, seal off.

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

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