She made a rapid progression from young skater

[WilliamTaft]

An example sentence using progression in Longman Advanced American Dictionary(retired): She made a rapid progression from young skater to world favorite. Just an example sentence, with no further context.

What's the difference if I say rapid progress in this sentence?

 

[teechar]

Although the meanings of "progress" and "progression" do overlap, the former has a stronger sense of development/improvement, whereas the latter can just mean moving on to the next stage(s) of some process.

 

[emsr2d2]

An example sentence using progression in Longman Advanced American Dictionary (retired): She made a rapid progression from young skater to world favorite.
This is just an example sentence, with no further context.

What's the difference if I say rapid progress in this sentence?

Note my changes above. I'm not sure I'd describe a website as "retired" but I get the gist.

 

[WilliamTaft]

Note my changes above.

Thank you, emsr2d2.