long-standing Synonyms

longstanding well-established traditional trad time-honored sustained substantial strong stout steady steadfast staying stationary stable sound settled sempervirent unyielding unalterable unfluctuating long-established dyed-in-the-wool confirmed stabile longtime long-term long-lasting unapologetic Antiguan Antigua unfading unashamed older age-old protracted prolonged immemorial former firm FAST evergreen established enduring durable diuturnal dateless continuing constant consistent chronic