Thesaurus.com
synonyms
  • definitions

unsubstantiated

see definition of unsubstantiated
  • adjquestionable, unproven
Relevance ranks synonyms and suggests the best matches based on how closely a synonym’s sense matches the sense you selected.
Relevance
A-Z
Length
-
+

Synonyms for unsubstantiated

adj questionable, unproven
  • debatable
  • dubious
  • unsupported
  • arguable
  • controversial
  • disputable
  • doubtful
  • dubitable
  • fishy
  • hard to believe
  • iffy
  • indefinite
  • open to doubt
  • open to question
  • suspect
  • suspicious
  • uncertain
  • unconfirmed
  • uncorroborated

Antonyms for unsubstantiated

  • certain
  • sure
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

More words related to unsubstantiated

apocryphal

adjective. questionable; fake

theoretic

adjective. theoretical
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.