Synonyms of unsupported

2 Syllables
groundless, dubious, unclear, suspect, unsound
3 Syllables
unsure, unsettled, baseless, unsteady, precarious, uncertain
4 Syllables
questionable, unreliable, problematic, foundationless
5 Syllables
unsubstantiated, undependable, indecisive
6 Syllables
uncorroborated