trip-up vs foul-up

trip-up and foul-up both are nouns.

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

As nouns, foul-up is a hypernym of trip-up; that is, foul-up is a word with a broader meaning than trip-up:

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

trip-up (noun)	foul-up (noun)
an unintentional but embarrassing blunder	an embarrassing mistake