prolongation vs duration

prolongation and duration both are nouns.

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

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

Other hypernyms of prolongation include length.

prolongation (noun)	duration (noun)
the act of prolonging something	continuance in time
amount or degree or range to which something extends	the property of enduring or continuing in time
the consequence of being lengthened in duration	the period of time during which something continues