foul-up vs bloomer

foul-up and bloomer both are nouns.

Word	Noun	Adjective	Verb	Adverb
foul-up	Yes	No	No	No
bloomer	Yes	No	No	No

As nouns, foul-up and bloomer are synonyms defined as:

Other synonyms of foul-up include blooper, blunder, boner, boo-boo, botch, bungle, flub, fuckup, pratfall.

foul-up (noun)	bloomer (noun)
an embarrassing mistake	an embarrassing mistake
	a flower that blooms in a particular way