regardless

disregarding

behindhand blind careless coarse crude deaf delinquent derelict heedless inadvertent inattentive inconsiderate insensitive lax listless mindless neglectful negligent nonobservant rash reckless remiss rude slack unfeeling unheeding uninterested unmindful

attentive concerned heedful

anyway nevertheless

against although aside from at any cost but come what may despite distinct from for all that in any case in spite of everything leaving aside no matter what nonetheless notwithstanding without considering without regard to

irregardless