Correction to my comment...

The Tombigbee merges with the Alabama to become the Mobile River as it enters Mobile Bay.
A lot of rhymes available there.

Historical Note:
Mobile Bay is where Admiral Farragut said "Damn the Torpedoes."
(Torpedoes were actually mines in 1864.

If none of that has any appeal, no problem.
I enjoyed thinking about it and looking it up. Your song prompted that.