What's the difference between drabber and drubber?

Drabber

Definition:

• (n.) One who associates with drabs; a wencher.

Example Sentences:

• (1) The world would be uninhabitable if all of us dreamt on the epic scale of Ali but it would be a considerably drabber place if one among us had not done so.
• (2) Driving north along the pot-holed road to Sofia the villages get poorer and drabber.

Drubber

Definition:

• (n.) One who drubs.

Example Sentences: