blame vs reproach

blame and reproach both are nouns.

Word	Noun	Adjective	Verb	Adverb
blame	Yes	Yes	Yes	No
reproach	Yes	No	Yes	No

As nouns, reproach is a hypernym of blame; that is, reproach is a word with a broader meaning than blame:

blame (noun)	reproach (noun)
a reproach for some lapse or misdeed	a mild rebuke or criticism
an accusation that you are responsible for some lapse or misdeed	disgrace or shame

blame (adjective)	reproach (adjective)
expletives used informally as intensifiers

blame (verb)	reproach (verb)
attribute responsibility to	express criticism towards
put or pin the blame on
harass with constant criticism