Synonyms of chronic

1 Syllable

val

2 Syllables

yearlong, stubborn, builtin, hard-shell, rooted, inbuilt, settled, fixed, usual, constant, inborn, inbred, in-built, lasting

3 Syllables

enduring, unyielding, routine, ceaseless, perennial, persistent, continuing, sustained, deep-rooted, deep-seated, lingering, ingrained, prolonged, habitual, hardcore, recurring, addicting, continual, recurrent, tenacious, protracted, long-lived, abiding, long-standing, persisting, lifelong, continuous, confirmed

4 Syllables

customary, incurable, obstinate, perdurable, ever-present, unabating

5 Syllables

inveterate, unmitigated, irradicable

6 Syllables

ineradicable