Nouns

(n)parturiency, labor, labour, confinement, lying-in, travail, childbedconcluding state of pregnancy; from the onset of contractions to the birth of a child“she was in labor for six hours”
(n)effort, elbow grease, exertion, travail, sweatuse of physical or mental energy; hard work“he got an A for effort”, “they managed only with great exertion”

Verbs

(v)labor, labour, toil, fag, travail, grind, drudge, dig, moilwork hard“She was digging away at her math homework”, “Lexicographers drudge all day long”