As verbs the difference between prolonged and lengthened
is that prolonged is (prolong) while lengthened is (lengthen).
As an adjective prolonged
is lengthy in duration; extended; protracted.
prolonged
English
Adjective
(
en adjective)
lengthy in duration; extended; protracted.
Antonyms
* brief
Verb
(head)
(prolong)
lengthened
English
Verb
(head)
(lengthen)
lengthen
English
Verb
(
en verb)
To make longer, to extend the length of.
To become longer.
Antonyms
* shorten