clanger vs bloomer

clanger and bloomer both are nouns.

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

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

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

clanger (noun)	bloomer (noun)
a conspicuous mistake whose effects seem to reverberate	an embarrassing mistake
	a flower that blooms in a particular way