Meaning : Concluding state of pregnancy. From the onset of contractions to the birth of a child.
Example :
She was in labor for six hours.
Synonyms : childbed, confinement, labor, labour, lying-in, parturiency
Meaning : Use of physical or mental energy. Hard work.
Example :
He got an A for effort.
They managed only with great exertion.
Synonyms : effort, elbow grease, exertion, sweat