weaken vs damp

weaken is not a noun while damp is a noun.

Word	Noun	Adjective	Verb	Adverb
weaken	No	No	Yes	No
damp	Yes	Yes	Yes	No

As verbs, weaken and damp are synonyms defined as:

Other synonyms of weaken include break, dampen, soften.

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

Other hyponyms of weaken include deafen, dampen, deaden.

weaken (noun)	damp (noun)
	a slight wetness

weaken (adjective)	damp (adjective)
	slightly wet

weaken (verb)	damp (verb)
become weaker	lessen in force or effect
lessen the strength of	make vague or obscure or make (an image) less visible
reduce the level or intensity or size or scope of	restrain or discourage
lessen in force or effect	deaden (a sound or noise), especially by wrapping
destroy property or hinder normal operations