snafu vs blunder

snafu and blunder both are nouns.

Word	Noun	Adjective	Verb	Adverb
snafu	Yes	Yes	Yes	No
blunder	Yes	No	Yes	No

As nouns, blunder is a hypernym of snafu; that is, blunder is a word with a broader meaning than snafu:

snafu: an acronym often used by soldiers in World War II: situation normal all fucked up
blunder: an embarrassing mistake

Other hypernyms of snafu include bloomer, blooper, boner, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall.

snafu (noun)	blunder (noun)
an acronym often used by soldiers in World War II: situation normal all fucked up	an embarrassing mistake

snafu (adjective)	blunder (adjective)
snarled or stalled in complete confusion

snafu (verb)	blunder (verb)
cause to be in a state of complete confusion	utter impulsively
	make one's way clumsily or blindly
	commit a faux pas or a fault or make a serious mistake