attain vs come through

attain and come through both are verbs.

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

As verbs, come through is a hyponym of attain; that is, come through is a word with a more specific, narrower meaning than attain:

attain: reach a destination, either real or abstract
come through: succeed in reaching a real or abstract destination after overcoming problems

As verbs, come through is a hypernym of attain; that is, come through is a word with a broader meaning than attain:

Other hypernyms of attain include bring home the bacon, deliver the goods, succeed, win.

attain (verb)	come through (verb)
reach a point in time, or a certain state or level	penetrate
reach a destination, either real or abstract	succeed in reaching a real or abstract destination after overcoming problems
find unexpectedly	attain success or reach a desired goal
to gain with effort	continue in existence after (an adversity, etc.)