well-timed vs timely

well-timed and timely both are adjectives.

Word	Noun	Adjective	Verb	Adverb
well-timed	No	Yes	No	Yes
timely	No	Yes	No	Yes

As adjectives, well-timed and timely are synonyms defined as:

well-timed and timely: done or happening at the appropriate or proper time

Other synonyms of well-timed include seasonable, well timed.

As adverbs, well-timed and timely are synonyms defined as:

Other synonyms of well-timed include apropos, seasonably.

well-timed (adjective)	timely (adjective)
done or happening at the appropriate or proper time	done or happening at the appropriate or proper time
	before a time limit expires

well-timed (adverb)	timely (adverb)
at an opportune time	at an opportune time