appraise vs rate

appraise is not a noun while rate is a noun.

Word	Noun	Adjective	Verb	Adverb
appraise	No	No	Yes	No
rate	Yes	No	Yes	No

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

appraise: evaluate or estimate the nature, quality, ability, extent, or significance of
rate: estimate the value of

Other hyponyms of appraise include grade, mark, score, value, standardise, standardize, reassess, reevaluate, censor, praise.

appraise (noun)	rate (noun)
	the relative speed of progress or change
	amount of a charge or payment relative to some basis
	a quantity or amount or measure considered as a proportion of another quantity or amount or measure
	a magnitude or frequency relative to a time unit

appraise (verb)	rate (verb)
consider in a comprehensive way	assign a rank or rating to
evaluate or estimate the nature, quality, ability, extent, or significance of	estimate the value of
	be worthy of or have a certain rating