clanger vs pratfall

clanger and pratfall both are nouns.

Word	Noun	Adjective	Verb	Adverb
clanger	Yes	No	No	No
pratfall	Yes	No	No	No

As nouns, pratfall is a hypernym of clanger; that is, pratfall is a word with a broader meaning than clanger:

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

clanger (noun)	pratfall (noun)
a conspicuous mistake whose effects seem to reverberate	an embarrassing mistake
	a fall onto your buttocks