back

v.

[1]	invest in , wager/bet on
[2]	back up , support , uphold , stand behind , promote , encourage , help , uphold , second , side with , endorse , aid , abet , assist , sponsor , subsidize , underwrite , subvene , finance , (Slang) (US/Canadian) bankroll
[3]	reverse , go/move in reverse , go/move backwards
[4]	back down (from)/off (from)/away (from)/out (of)/up , withdraw (from) , retreat (from) , abandon , retire (from) , backtrack (from) , shy away (from) , recoil (from) , turn tail (from)
[5]	indorse , plump for , plunk for
[6]	indorse
[7]	bet on , gage , stake , game , punt

n.

[1]	dorsum
[2]	spinal column , backside , rear , vertebral column , spine , (Technical) dorsum , backbone , rachis
[3]	binding , at the back of/at someone's back , behind , book binding , cover , following , pursuing , chasing , (US) in back of
[4]	behind the back of/behind someone's back , surreptitiously , secretly , clandestinely , privately , furtively , sneakily , slyly , treacherously , traitorously , perfidiously , deceitfully , insidiously
[5]	break the back of , backrest
[6]	overcome , master
[7]	(US) crush , ruin , bankrupt , destroy , defeat , vanquish , (Colloq) break
[8]	on (someone's) back , (US) weighing (down) on/upon (someone) , burdening (someone) , lodged with (someone) , resting with (someone)
[9]	turn one's back on/upon , abandon , forsake , ignore , disregard , repudiate , reject , cast off , disown , deny
[10]	with one's back to/against the wall , hard pressed , struggling (against odds) , without hope , with little/no hope , helpless , in dire straits , in (serious) trouble

adv.

[1]	to/toward(s) the rear , rearward(s) , backward(s) , away
[2]	5 in return/repayment/requital/retaliation , again
[3]	ago , in time(s) past
[4]	behind , behindhand , in arrears , overdue
[5]	go back on , renege , fail , deny , disavow , break , repudiate
[6]	backward , backwards , rearward , rearwards
[7]	backward

adj.

[1]	rear , service , servants'
[2]	(US/Australian/New Zealand) outlying , remote , isolated , distant , undeveloped , primitive , raw , rough , uncivilized
[3]	in arrears , overdue , past due , late , behindhand
[4]	hind , hinder