snafu vs boo-boo

snafu and boo-boo both are nouns.

Word	Noun	Adjective	Verb	Adverb
snafu	Yes	Yes	Yes	No
boo-boo	Yes	No	No	No

As nouns, boo-boo is a hypernym of snafu; that is, boo-boo 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
boo-boo: an embarrassing mistake

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

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

snafu (adjective)	boo-boo (adjective)
snarled or stalled in complete confusion

snafu (verb)	boo-boo (verb)
cause to be in a state of complete confusion