well timed vs well-timed

well timed and well-timed both are adjectives.

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

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

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

Other synonyms of well timed include seasonable, timely.

well timed (adjective)	well-timed (adjective)
done or happening at the appropriate or proper time	done or happening at the appropriate or proper time

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