blunder vs transgress

blunder is a noun but transgress is not a noun.

Word	Noun	Adjective	Verb	Adverb
blunder	Yes	No	Yes	No
transgress	No	No	Yes	No

As verbs, transgress is a hypernym of blunder; that is, transgress is a word with a broader meaning than blunder:

Other hypernyms of blunder include breach, break, go against, infract, offend, violate.

blunder (noun)	transgress (noun)
an embarrassing mistake

blunder (verb)	transgress (verb)
utter impulsively	pass beyond (limits or boundaries)
make one's way clumsily or blindly	act in disregard of laws, rules, contracts, or promises
commit a faux pas or a fault or make a serious mistake	commit a sin; violate a law of God or a moral law
	spread over land, especially along a subsiding shoreline