backup Antonyms

hurdle manacle millstone mogul more needed obligatory octave owner patron prime primary principal main load immoderateness impairment important incommodity indispensable inhibition inhibitor insatiability interruption inutility irritant key proprietor ranking referrer honcho criticality roadblock foreperson chairperson chairwoman kingpin inappropriateness superordinate hiccup headmaster high-ranking bad luck warden repression retardation retardment snag steward subservience