well-timed vs well timed

well-timed and well timed both are adjectives.

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

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