come across vs come over

come across and come over both are verbs.

Word	Noun	Adjective	Verb	Adverb
come across	No	No	Yes	No
come over	No	No	Yes	No

As verbs, come across and come over are synonyms defined as:

come across and come over: communicate the intended meaning or impression

come across (verb)	come over (verb)
be received or understood	communicate the intended meaning or impression
communicate the intended meaning or impression
come together
be perceived in a certain way; make a certain impression
find unexpectedly