sed one-liner

I have a data base of part numbers:
AAA Thing1
BBB Thing2
CCC Thing3

File one is a list of part numbers:
AAA234
BBB678
CCC2345

Is there a sed one-line that would compare a data base with and replace the part numbers so that the output looks like this?

AAA234 Thing1
BBB678 Thing2
CCC2345 Thing3

Thank you.