attain vs come across

attain and come across both are verbs.

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

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

Other synonyms of attain include chance on, chance upon, come upon, discover, fall upon, happen upon, light upon, strike.

attain (verb)	come across (verb)
reach a point in time, or a certain state or level	be received or understood
reach a destination, either real or abstract	communicate the intended meaning or impression
find unexpectedly	come together
to gain with effort	be perceived in a certain way; make a certain impression
	find unexpectedly