careless
disregardant
disregardful
distracted
distrait
heedless
inadvertent
inattentive
inconstant
incurious
indifferent
negligent
nonadherent
noncompliant
nonconforming
nonobservant
regardless
thoughtless
uncompliant
unconforming
unfaithful
unheedful
unheeding
unloyal
unmarking
unmindful
unnoticing
unnoting
unobservant
unobserving
unperceiving
unremarking
untrue
unwatchful