longstanding Definition

long, longtime, persistent, enduring, perennial, longterm, traditional, historic, recurring, chronic, historical, protracted, lengthy, ancient, permanent, former, prolonged, secular, lasting, extended, ancestral, sustainable, sustained, durable, old, age-old, long-, long-established, long-lasting, long-life, long-lived, long-run, long-running, long-standing, long-term, long-time, longer-term, time-honored, well-established, steadfast, ongoing, unwavering, lifelong, continual, staunch, storied, unshakable, familial, mutual, unswerving, abiding, preexisting, its, fundamental, contractual, long run, neighborly, founding, unflagging, recent, ostensible, festering, lingering, long time, pioneering, unyielding, widespread, make peace, strong, avowed, strategic, current, inextricable, multifaceted, extensive, preeminent, unfailing, assertory, unquestionable, singular, continuous, venerable, frequent, inherent, ascetical, reciprocal, unwritten, undeniable, bone of contention, unparalleled, significant, knottiest, nettlesome, loyal, difference of opinion, apparent, hit it up, particular, entrenched, anzus,