task vs depute

task is a noun but depute is not a noun.

Word	Noun	Adjective	Verb	Adverb
task	Yes	No	Yes	No
depute	No	No	Yes	No

As verbs, depute is a hypernym of task; that is, depute is a word with a broader meaning than task:

task: assign a task to
depute: give an assignment to (a person) to a post, or assign a task to (a person)

Other hypernyms of task include assign, delegate, designate.

task (noun)	depute (noun)
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

task (verb)	depute (verb)
use to the limit	transfer power to someone
assign a task to	appoint as a substitute
	give an assignment to (a person) to a post, or assign a task to (a person)