obtrude upon vs encroach upon

obtrude upon and encroach upon both are verbs.

Word	Noun	Adjective	Verb	Adverb
obtrude upon	No	No	Yes	No
encroach upon	No	No	Yes	No

As verbs, obtrude upon and encroach upon are synonyms defined as:

obtrude upon and encroach upon: to intrude upon, infringe, encroach on, violate

Other synonyms of obtrude upon include intrude on, invade.

obtrude upon (verb)	encroach upon (verb)
to intrude upon, infringe, encroach on, violate	to intrude upon, infringe, encroach on, violate