baseless
without a basis in reason or fact
groundless
without a basis in reason or fact
unwarranted
incapable of being justified or explained
unjustified
lacking justification or authorization
undue
not appropriate or proper (or even legal) in the circumstances
insupportable
incapable of being justified or explained
indefensible
not able to be protected against attack
unjustifiable
incapable of being justified or explained
unfounded
without a basis in reason or fact
allegation
(law) a formal accusation against somebody (often in a court of law)
accusation
an assertion that someone is guilty of a fault or offence
plaint
(United Kingdom) a written statement of the grounds of complaint made to court of law asking for the grievance to be redressed
lodgement
the state or quality of being lodged or fixed even temporarily
complaint
an expression of grievance or resentment
occurrence
an instance of something occurring
commotion
a disorderly outburst or tumult
disruption
an act of delaying or interrupting the continuity
disturbance
activity that is a malfunction, intrusion, or interruption
stir
move an implement through
ruckus
the act of making a noisy disturbance
ruction
the act of making a noisy disturbance
din
a loud harsh or strident noise