Nouns

(n)remainder, balance, residual, residue, residuum, restsomething left after other parts have been taken away“there was no remainder”, “he threw away the rest”, “he took what he wanted and I got the balance”
(n)rest, ease, repose, relaxationfreedom from activity (work or strain or responsibility)“took his repose by the swimming pool”
(n)respite, rest, relief, rest perioda pause for relaxation“people actually accomplish more when they take time for short rests”
(n)resta state of inaction“a body will continue in a state of rest until acted upon”
(n)rest, eternal rest, sleep, eternal sleep, quietuseuphemisms for death (based on an analogy between lying in a bed and in a tomb)“she was laid to rest beside her husband”, “they had to put their family pet to sleep”
(n)resta support on which things can be put“the gun was steadied on a special rest”
(n)resta musical notation indicating a silence of a specified duration

Verbs

(v)restnot move; be in a resting position
(v)rest, breathe, catch one's breath, take a breathertake a short break from one's activities in order to relax
(v)restgive a rest to“He rested his bad leg”, “Rest the dogs for a moment”
(v)lie, resthave a place in relation to something else“The fate of Bosnia lies in the hands of the West”, “The responsibility rests with the Allies”
(v)restbe at rest
(v)stay, remain, reststay the same; remain in a certain state“The dress remained wet after repeated attempts to dry it”, “rest assured”, “stay alone”, “He remained unmoved by her tears”, “The bad weather continued for another week”
(v)rest, reside, reposebe inherent or innate in
(v)restput something in a resting position, as for support or steadying“Rest your head on my shoulder”
(v)perch, roost, restsit, as on a branch“The birds perched high in the tree”
(v)pillow, restrest on or as if on a pillow“pillow your head”
(v)restbe inactive, refrain from acting“The committee is resting over the summer”