protraction vs prolongation

protraction and prolongation both are nouns.

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

As nouns, protraction and prolongation are synonyms defined as:

Other synonyms of protraction include lengthening, perpetuation.

As nouns, protraction and prolongation are synonyms defined as:

protraction and prolongation: the consequence of being lengthened in duration

Other synonyms of protraction include continuation, lengthiness.

protraction (noun)	prolongation (noun)
the act of prolonging something	the act of prolonging something
the consequence of being lengthened in duration	amount or degree or range to which something extends
	the consequence of being lengthened in duration