Nouns

(n)closera person who closes something“whoever is the closer has to turn out the lights and lock up”
(n)closer, finisher(baseball) a relief pitcher who can protect a lead in the last inning or two of the game

Adverbs

(r)nearer, nigher, closer(comparative of `near' or `close') within a shorter distance“come closer, my dear!”, “they drew nearer”, “getting nearer to the true explanation”