pratfall vs foul-up

pratfall and foul-up both are nouns.

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

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

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

pratfall (noun)	foul-up (noun)
an embarrassing mistake	an embarrassing mistake
a fall onto your buttocks