Synonyms for constant

absolute, balanced, ceaseless, changeless, consistent, continual, continued, continuous, devoted, enduring, faithful, fixed, frequent, habitual, immutable, incessant, industrious, inexhaustible, interminable, invariable, lasting, loyal, non-stop, nonstop, ongoing, permanent, perpetual, persistent, regular, reliable, sedulous, stable, steadfast, steady, sustainable, sustained, true-blue, unabated, unalterable, unceasing, unchangeable, unchanging, undeviating, unending, unfailing, unfluctuating, uninterrupted, unrelenting, unremitting, unshakeable, unswerving, untiring, unvarying, unvarying., unwavering