overstep vs transgress

overstep and transgress both are verbs.

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

As verbs, overstep and transgress are synonyms defined as:

Other synonyms of overstep include trespass.

overstep (verb)	transgress (verb)
pass beyond (limits or boundaries)	pass beyond (limits or boundaries)
be superior or better than some standard	act in disregard of laws, rules, contracts, or promises
	commit a sin; violate a law of God or a moral law
	spread over land, especially along a subsiding shoreline