Difference between Unfounded and Groundless

UNFOUNDED vs GROUNDLESS: ADJECTIVE

Without any grounds to support it; baseless.
Without ground or foundation; wanting cause or reason for support; not authorized; false; baseless
Having no ground or foundation; unsubstantiated: : baseless.
Without a basis in reason or fact

Not founded; not built or established. Having no foundation; vain; idle; baseless: as, unfounded expectations.

Without ground or foundation; especially, having no adequate cause or reason; not authorized; baseless.

Unreasonable, Spurious, Ungrounded, False, Irrational, Inaccurate, Erroneous, Unjustified, Unsubstantiated, Untrue, Idle, Unsupported, Unwarranted, Baseless, Groundless

Unjustifiable, Substantiated, Irrational, False, Unreasonable, Frivolous, Unjustified, Unsubstantiated, Ungrounded, Untrue, Idle, Unsupported, Unwarranted, Baseless, Unfounded

Unreasonable, Spurious, Ungrounded, False, Irrational, Inaccurate, Erroneous, Unjustified, Unsubstantiated, Untrue, Idle, Unsupported, Unwarranted, Baseless, Groundless

Unjustifiable, Substantiated, Irrational, False, Unreasonable, Frivolous, Unjustified, Unsubstantiated, Ungrounded, Untrue, Idle, Unsupported, Unwarranted, Baseless, Unfounded

Americans feel toward large corporations is not unfounded.
This fear of ethnic secession is not unfounded.
Arab minority living within its borders, are unfounded.
Are Unfounded or Inconclusive Reports Reported to CACI?
Further, his assumption was not an unfounded one.
History has proven those fears to be unfounded.
British subjects might lead to war proved unfounded.
Unfounded: Investigation indicates that the allegations are false.
Eric --- unfounded mail is cushioned polymyositis Free.
Unfounded final determination has the right to request the unfounded case be retained as intentionally false notified medical.

But once construction was complete, the concerns proved groundless.
Names have indeed been mentioned, but on groundless conjecture.
How many of these requests, if any, were groundless?
Brown, and that they proved to be groundless.
The murder charges were proved groundless long ago.
The charges, including witchcraft, were dismissed as groundless.
Fees and costs awarded for groundless actions Sec.
LEU program, are, to say the least, groundless.
Lincoln was not displeased to find them groundless.
The defenses were groundless and in bad faith or groundless and brought for the purpose of harassment.