unsubstantiated
- adjective (adj)
Meaning: questionable, unproven
Synonyms:
arguable
controversial
debatable
disputable
doubtful
dubious
dubitable
fishy
hard to believe
iffy
indefinite
open to doubt
open to question
suspect
suspicious
uncertain
unconfirmed
uncorroborated
unsupported
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.