extroverted vs forthcoming

extroverted and forthcoming both are adjectives.

Word	Noun	Adjective	Verb	Adverb
extroverted	No	Yes	No	No
forthcoming	No	Yes	No	No

As adjectives, extroverted and forthcoming are synonyms defined as:

Other synonyms of extroverted include outgoing.

extroverted (adjective)	forthcoming (adjective)
not introspective; examining what is outside yourself	available when required or as promised
being concerned with the social and physical environment	of the relatively near future
at ease in talking to others	at ease in talking to others