seasonably vs well-timed

seasonably is not an adjective while well-timed is an adjective.

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

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

Other synonyms of seasonably include apropos, timely.

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

seasonably (adverb)	well-timed (adverb)
at an opportune time	at an opportune time
in accordance with the season