labour of love vs task

labour of love and task both are nouns.

Word	Noun	Adjective	Verb	Adverb
labour of love	Yes	No	No	No
task	Yes	No	Yes	No

As nouns, task is a hypernym of labour of love; that is, task is a word with a broader meaning than labour of love:

labour of love: productive work performed voluntarily without material reward or compensation
task: any piece of work that is undertaken or attempted

Other hypernyms of labour of love include labor, labour, project, undertaking.

labour of love (noun)	task (noun)
productive work performed voluntarily without material reward or compensation	a specific piece of work required to be done as a duty or for a specific fee
	any piece of work that is undertaken or attempted

labour of love (verb)	task (verb)
	use to the limit
	assign a task to