Nouns

(n)rearthe back of a military formation or procession“infantrymen were in the rear”
(n)rear, backside, back endthe side of an object that is opposite its front“his room was toward the rear of the hotel”
(n)back, rearthe part of something that is furthest from the normal viewer“he stood at the back of the stage”, “it was hidden in the rear of the store”
(n)buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, behind, derriere, fanny, assthe fleshy part of the human body that you sit on“he deserves a good kick in the butt”, “are you going to sit on your fanny and do nothing?”
(n)rear, backthe side that goes last or is not normally seen“he wrote the date on the back of the photograph”

Verbs

(v)rear, rise upstand up on the hind legs, of quadrupeds“The horse reared in terror”
(v)rear, raise, bring up, nurture, parentlook after a child until it is an adult“raise a family”, “bring up children”
(v)rise, lift, rearrise up“The building rose before them”
(v)rear, erectcause to rise up
(v)raise, erect, rear, set up, put upconstruct, build, or erect“Raise a barn”

Adjectives

(s)rear, rearwardlocated in or toward the back or rear“the chair's rear legs”, “the rear door of the plane”, “on the rearward side”