blunder vs trip-up

blunder and trip-up both are nouns.

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

As nouns, trip-up is a hyponym of blunder; that is, trip-up is a word with a more specific, narrower meaning than blunder:

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

blunder (verb)	trip-up (verb)
utter impulsively
make one's way clumsily or blindly
commit a faux pas or a fault or make a serious mistake