prolonged vs drawn-out

prolonged and drawn-out both are adjectives.

Word	Noun	Adjective	Verb	Adverb
prolonged	No	Yes	No	No
drawn-out	No	Yes	No	No

As adjectives, prolonged and drawn-out are synonyms defined as:

prolonged and drawn-out: relatively long in duration; tediously protracted

Other synonyms of prolonged include extended, lengthy, protracted.

prolonged (adjective)	drawn-out (adjective)
drawn out or made longer spatially	relatively long in duration; tediously protracted
relatively long in duration; tediously protracted	(used of speech) uttered slowly with prolonged vowels