probationary vs tentative

probationary and tentative both are adjectives.

Word	Noun	Adjective	Verb	Adverb
probationary	No	Yes	No	No
tentative	No	Yes	No	No

As adjectives, probationary and tentative are synonyms defined as:

probationary and tentative: under terms not final or fully worked out or agreed upon

Other synonyms of probationary include provisional, provisionary.

probationary (adjective)	tentative (adjective)
under terms not final or fully worked out or agreed upon	under terms not final or fully worked out or agreed upon
	unsettled in mind or opinion