attain vs progress to

attain and progress to both are verbs.

Word	Noun	Adjective	Verb	Adverb
attain	No	No	Yes	No
progress to	No	No	Yes	No

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

Other hyponyms of attain include score, get to, make, reach, begin, come to, strike, culminate, compass, average, finagle, manage, wangle.

attain (verb)	progress to (verb)
reach a point in time, or a certain state or level	reach a goal
reach a destination, either real or abstract
find unexpectedly
to gain with effort