Toil
Part of speech: noun
Definition: labour, work trouble, strife
Part of speech: verb
Definition: to labour, to work to struggle
Example sentence: Work is toil: what one does only to earn a living. If it gives pleasure, it is leisure.
Labor
Part of speech: noun
Definition: Effort expended on a particular task; toil, work.Workers in general; the working class, the workforce; sometimes specifically the labor movement, organised labor.The act of a mother giving birth.The time period during which a mother gives birth.
Part of speech: verb
Definition: spelling of labour; see British/commonwealth entry for definitions, etymology, pronunciation, translations, etc.
Example sentence: Difficulties strengthen the mind, as labor does the body.