1.
[syn: baseless, groundless, idle, unfounded, unwarranted, wild]
The Collaborative International Dictionary of English v.0.48:
Unfounded \Un*found"ed\, a.
1. Not founded; not built or established. --Milton.
[1913 Webster]
2. Having no foundation; baseless; vain; idle; as, unfounded
expectations. --Paley.
[1913 Webster]
WordNet (r) 3.0 (2006):
unfounded
adj 1: without a basis in reason or fact; "baseless gossip";
"the allegations proved groundless"; "idle fears";
"unfounded suspicions"; "unwarranted jealousy" [syn:
baseless, groundless, idle, unfounded,
unwarranted, wild]