prolong vs continue

prolong and continue both are verbs.

Word	Noun	Adjective	Verb	Adverb
prolong	No	No	Yes	No
continue	No	No	Yes	No

As verbs, continue is a hypernym of prolong; that is, continue is a word with a broader meaning than prolong:

Other hypernyms of prolong include bear on, carry on, preserve, uphold.

As verbs, continue is a hyponym of prolong; that is, continue is a word with a more specific, narrower meaning than prolong:

prolong: lengthen or extend in duration or space
continue: allow to remain in a place or position or maintain a property or feature

Other hyponyms of prolong include keep, keep on, retain.

prolong (verb)	continue (verb)
lengthen in time; cause to be or last longer	exist over a prolonged period of time
lengthen or extend in duration or space	continue talking
	move ahead; travel onward in time or space
	allow to remain in a place or position or maintain a property or feature
	keep or maintain in unaltered condition; cause to remain or last
	continue a certain state, condition, or activity
	span an interval of distance, space or time
	continue in a place, position, or situation
	continue after an interruption
	do something repeatedly and showing no intention to stop