dubitable vs in question

dubitable and in question both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dubitable	No	Yes	No	No
in question	No	Yes	No	No

As adjectives, dubitable and in question are synonyms defined as:

Other synonyms of dubitable include doubtful, dubious.

dubitable (adjective)	in question (adjective)
open to doubt or suspicion	open to doubt or suspicion