continuation vs duration

continuation and duration both are nouns.

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

As nouns, duration is a hypernym of continuation; that is, duration is a word with a broader meaning than continuation:

Other hypernyms of continuation include length.

continuation (noun)	duration (noun)
the act of continuing an activity without interruption	continuance in time
the consequence of being lengthened in duration	the property of enduring or continuing in time
a Gestalt principle of organization holding that there is an innate tendency to perceive a line as continuing its established direction	the period of time during which something continues
a part added to a book or play that continues and extends it