duration vs stint

duration and stint both are nouns.

Word	Noun	Adjective	Verb	Adverb
duration	Yes	No	No	No
stint	Yes	No	Yes	No

As nouns, stint is a hyponym of duration; that is, stint is a word with a more specific, narrower meaning than duration:

Other hyponyms of duration include clocking, longueur, residence time, span, stretch, time scale, note value, time value, value, rule.

duration (noun)	stint (noun)
continuance in time	an individual's prescribed share of work
the property of enduring or continuing in time	smallest American sandpiper
the period of time during which something continues	an unbroken period of time during which you do something

duration (verb)	stint (verb)
	subsist on a meager allowance
	supply sparingly and with restricted quantities