unfounded
1. [ adjective ] without a basis in reason or fact
Synonyms: groundless idle unwarranted baseless
Examples:

"baseless gossip" "the allegations proved groundless" "idle fears" "unfounded suspicions" "unwarranted jealousy"

Related terms: unsupported
Similar spelling:   unbounded
  unfunded
  unbound
  unbanded
  unpointed
  unpunished
  unopened
  unopen
  unwoven
  unoffending
  unfunny
  unbind
  unbend