seasonably vs timely

seasonably is not an adjective while timely is an adjective.

Word	Noun	Adjective	Verb	Adverb
seasonably	No	No	No	Yes
timely	No	Yes	No	Yes

As adverbs, seasonably and timely are synonyms defined as:

Other synonyms of seasonably include apropos, well-timed.

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

seasonably (adverb)	timely (adverb)
at an opportune time	at an opportune time
in accordance with the season