boo-boo vs pratfall

boo-boo and pratfall both are nouns.

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

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

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

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