door's always open

available handy reachable usable

attainable employable exposed getatable near obtainable open operative possible practicable public susceptible unrestricted

unhandy useless

inaccessible limited restricted

convenient

attainable come-at-able getable obtainable reachable

formal inaccessible unapproachable uncongenial unfriendly unreachable unsociable

accessible

attainable come-at-able convenient getable obtainable reachable red-carpet responsive