blindman's buff vs blindman's bluff

blindman's buff and blindman's bluff both are nouns.

Word	Noun	Adjective	Verb	Adverb
blindman's buff	Yes	No	No	No
blindman's bluff	Yes	No	No	No

As nouns, blindman's buff and blindman's bluff are synonyms defined as:

blindman's buff and blindman's bluff: a children's game in which a blindfolded player tries to catch and identify other players

blindman's buff (noun)	blindman's bluff (noun)
a children's game in which a blindfolded player tries to catch and identify other players	a children's game in which a blindfolded player tries to catch and identify other players