Synonyms of 'chronic'

abiding, accepted, accustomed, aged, ancient, antique, confirmed, constant, customary, deep-dyed, deep-rooted, deep-seated, durable, dyed-in-the-wool, enduring, Evergreen, fast, fixed, habitual, hardened, hardy, immutable, incorrigible, ingrained, inveterate, irreversible, lasting, long-lived, long-term, longevous, macrobiotic, perdurable, perennial, permanent, perpetual, persistent, routine, set, stable, steadfast, thorough, tough, unfading, vital, wonted