approbative vs plausive

approbative and plausive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
approbative	No	Yes	No	No
plausive	No	Yes	No	No

As adjectives, approbative and plausive are synonyms defined as:

Other synonyms of approbative include affirmative, approbatory, approving.

approbative (adjective)	plausive (adjective)
expressing or manifesting praise or approval	expressing or manifesting praise or approval