Difference between Backside and Rump

BACKSIDE vs RUMP: NOUN

The buttocks.
The side of something that is opposite the front.
The hinder part, posteriors, or rump of a person or animal.
The back premises, back yard, or out-buildings attached to a dwelling; also, the privy.
Specifically The hind part of an animal; the rump: often (vulgarly) in the plural.
The back part or aspect of anything; the part opposite to the front, or behind that which is presented to a spectator.
The buttocks; the rump.
The side of an object that is opposite its front
The fleshy part of the human body that you sit on

The buttocks.
The fleshy hindquarters of an animal.
The part of a quadruped that corresponds to the human buttocks
The fleshy part of the human body that you sit on
Fleshy hindquarters; behind the loin and above the round
A cut of beef or veal from the rump.
The part of a bird's back nearest the tail.
The last or inferior part.
A legislature having only a small part of its original membership and therefore being unrepresentative or lacking in authority.
The tail-end of an animal; the hinder parts; the backside or buttocks; technically, the gluteal or uropygial region; the uropygium. See sacrum and uropygium.
Figuratively. the fag-end of a thing.
The end of the backbone of an animal, with the parts adjacent; the buttock or buttocks.
Among butchers, the piece of beef between the sirloin and the aitchbone piece. See Illust. of Beef.
The hind or tail end; a fag-end; a remnant.
The remnant of the Long Parliament after the expulsion by Cromwell in 1648 of those who opposed his purposes. It was dissolved by Cromwell in 1653, but twice revived for brief sessions, ending finally in 1659.
A beefsteak from the rump.
The hindquarters of an animal
A cut of meat from the rump
Remnant, as in rump parliament

Arse, Prat, Rump, Tail, Rear, Posterior, Keister, Buttocks, Bum, Tush, Ass, Derriere, Hindquarters, Fanny, Butt

Seat, Buns, Prat, Keister, Buttocks, Butt, Bum, Backside, Ass, Derriere, Fanny, Tail, Posterior, Tush, Hindquarters

Arse, Prat, Rump, Tail, Rear, Posterior, Keister, Buttocks, Bum, Tush, Ass, Derriere, Hindquarters, Fanny, Butt

Rear, Seat, Prat, Keister, Buttocks, Butt, Bum, Backside, Ass, Derriere, Fanny, Tail, Posterior, Tush, Hindquarters

Six feet or more from rump to snout.
MEAT SPECIALS Heavy Steer Face Rump Roast LB.
Buchner NJ, Sanner BM, Borgel J, Rump LC.
One pack contains around a few rump steaks.
Lions Rump, King George Island, South Shetland Islands.
Creek Black Angus rump or roasted beetroot salad.
Not to mention her rump, against my palm.
Utility locating, and a greyish white rump Patch and a greyish white rump Patch forming antlers in the by!
'Rump Steak with Creamy Sweet Mash' For the rump tie it with a string so that its round, yes thats how restaurants do it.
Ronaldo Rump launches his Regenerator into orbit over the Arctic Nature Preserve, planning to turn acres of natural wilderness into Rump Amusement Park!