Synonyms of tentative

1 Syllable

trial, test

2 Syllables

humblest, cautious, hushhush, subber, humbler, iffy, subject, weak-kneed, halting, acting

3 Syllables

theoretic, dependent, makeshift, claudicant, unsettled, contingent, dithering, astraddle, hesitant, middle-ground, vicarial, timorous, vacillant

4 Syllables

unfinished, forethoughtful, noncommittal, trial-and-error, substituted, ideational, substitute, temporary, conjectural, unconfirmed, theoretical, substituting, unfulfilled, even-steven, conditional, on-the-fence, unassembled, unrevealing, unperfected, provisional, provisory, shillyshally, undecided

5 Syllables

speculative, supplicatory, experimental, irresolute, probationary, indecisive, provisionary, codicillary, substitutive, indefinite