Synonyms for groundless
adj without reason, justificationAntonyms for groundless
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.
flimsy
adjective. unconvincing, implausible
idle
adjective. worthless, ineffective
illogical
adjective. not making sense
- absurd
- casuistic
- cockeyed
- fallacious
- false
- fatuous
- faulty
- groundless
- hollow
- implausible
- inconclusive
- incongruous
- inconsequent
- inconsistent
- incorrect
- invalid
- irrational
- irrelevant
- mad
- meaningless
- not following
- nutty
- off the wall
- preposterous
- screwy
- self-contradictory
- senseless
- sophistic
- sophistical
- specious
- spurious
- unconnected
- unproved
- unreasonable
- unscientific
- unsound
- unsubstantial
- untenable
- wacky
- without basis
- without foundation
nonexistent
adjective. fictional, not real
- absent
- airy
- baseless
- blank
- chimerical
- dead
- defunct
- departed
- dreamlike
- dreamy
- empty
- ethereal
- extinct
- extinguished
- fancied
- few and far between
- flimsy
- gone
- gossamery
- groundless
- hallucinatory
- hypothetical
- illusory
- imaginary
- imagined
- immaterial
- imponderable
- insubstantial
- legendary
- lost
- missing
- mythical
- negative
- null
- null and void
- passed away
- passed on
- perished
- shadowy
- tenuous
- ungrounded
- unreal
- unsubstantial
- vacant
- vague
- vaporous
- void
- without foundation
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.