err vs trip up

err and trip up both are verbs.

Word	Noun	Adjective	Verb	Adverb
err	No	No	Yes	No
trip up	No	No	Yes	No

As verbs, trip up is a hyponym of err; that is, trip up is a word with a more specific, narrower meaning than err:

Other hyponyms of err include misremember, slip up, stumble, misjudge, fall for.

err (verb)	trip up (verb)
to make a mistake or be incorrect	detect a blunder or misstep
wander from a direct course or at random	make an error
	cause to stumble