revaluation vs appraisal

revaluation and appraisal both are nouns.

Word	Noun	Adjective	Verb	Adverb
revaluation	Yes	No	No	No
appraisal	Yes	No	No	No

As nouns, appraisal is a hypernym of revaluation; that is, appraisal is a word with a broader meaning than revaluation:

revaluation: a new appraisal or evaluation
appraisal: the classification of someone or something with respect to its worth

Other hypernyms of revaluation include assessment.

revaluation (noun)	appraisal (noun)
a new appraisal or evaluation	an expert estimation of the quality, quantity, and other characteristics of someone or something
	the classification of someone or something with respect to its worth
	a document appraising the value of something (as for insurance or taxation)