run into vs come across

run into and come across both are verbs.

Word	Noun	Adjective	Verb	Adverb
run into	No	No	Yes	No
come across	No	No	Yes	No

As verbs, run into and come across are synonyms defined as:

Other synonyms of run into include encounter, meet, run across, see.

run into (verb)	come across (verb)
collide violently with an obstacle	be received or understood
hit against; come into sudden contact with	communicate the intended meaning or impression
come together	come together
be beset by	be perceived in a certain way; make a certain impression
	find unexpectedly