overstep vs trespass

overstep is not a noun while trespass is a noun.

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

As verbs, overstep and trespass are synonyms defined as:

Other synonyms of overstep include transgress.

overstep (noun)	trespass (noun)
	entry to another's property without right or permission
	a wrongful interference with the possession of property (personal property as well as realty), or the action instituted to recover damages

overstep (verb)	trespass (verb)
pass beyond (limits or boundaries)	pass beyond (limits or boundaries)
be superior or better than some standard	break the law
	enter unlawfully on someone's property
	commit a sin; violate a law of God or a moral law
	make excessive use of