Synonyms of foundationless
- 2 Syllables
- flimsy, groundless
- 3 Syllables
- bottomless, ungrounded, baseless, gratuitous, unfounded, reasonless
- 4 Syllables
- unwarranted, unprovoked, untenable, unjustified, unconfirmed, unsupported
- 5 Syllables
- unjustifiable, unsubstantiated
- 6 Syllables
- uncorroborated