claim vs affirm

claim is a noun but affirm is not a noun.

Word	Noun	Adjective	Verb	Adverb
claim	Yes	No	Yes	No
affirm	No	No	Yes	No

As verbs, affirm is a hypernym of claim; that is, affirm is a word with a broader meaning than claim:

As verbs, affirm is a hypernym of claim; that is, affirm is a word with a broader meaning than claim:

Other hypernyms of claim include assert, aver, avow, swan, swear, verify.

claim (noun)	affirm (noun)
demand for something as rightful or due
an established or recognized right
an informal right to something
an assertion of a right (as to money or property)
a demand
an assertion that something is true or factual

claim (verb)	affirm (verb)
assert or affirm strongly; state to be true or existing	establish or strengthen as with new evidence or facts
take as an undesirable consequence of some event or state of affairs	to declare or affirm solemnly and formally as true
ask for legally or make a legal claim to, as of debts, for example	say yes to
lay claim to; as of an idea
demand as being one's due or property; assert one's right or title to