pratfall vs boo-boo

pratfall and boo-boo both are nouns.

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

As nouns, pratfall and boo-boo are synonyms defined as:

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

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