flaw vs blemish

flaw and blemish both are nouns.

Word	Noun	Adjective	Verb	Adverb
flaw	Yes	No	Yes	No
blemish	Yes	No	Yes	No

As verbs, flaw and blemish are synonyms defined as:

flaw (noun)	blemish (noun)
an imperfection in an object or machine	a mark or flaw that spoils the appearance of something (especially on a person's body)
defect or weakness in a person's character
an imperfection in a plan or theory or legal document that causes it to fail or that reduces its effectiveness

flaw (verb)	blemish (verb)
add a flaw or blemish to; make imperfect or defective	add a flaw or blemish to; make imperfect or defective
	mar or impair with a flaw
	mar or spoil the appearance of