Synonyms of chronic in English:

chronic


See US English definition of chronic

See UK English definition of chronic

See Spanish definition of crónico

adjective

1‘a chronic illness’

SYNONYMS
persistent, long-standing, long-term, constantly recurring
incurable
rare immedicable
ANTONYMS

acute

2‘the chronic shortage of food’

SYNONYMS
constant, continuing, continual, ceaseless, incessant, unabating, unending, persistent, perennial, long-lasting, lingering
deep-rooted, deep-seated, ineradicable
severe, serious, acute, grave, dire
ANTONYMS

temporary, mild

3‘a chronic liar’

SYNONYMS
inveterate, confirmed, hardened, dyed-in-the-wool, incorrigible, habitual
compulsive, pathological
ANTONYMS

occasional

4‘the film was absolutely chronic’

SYNONYMS
very bad, appalling, awful, dreadful, terrible, frightful, atrocious, hopeless, abominable, laughable, lamentable, execrable
informal crummy, pathetic, rotten, useless, woeful, lousy, abysmal, dire, godawful, the pits
British informal duff, rubbish, pants, a load of pants, poxy
vulgar slang crap, shit, chickenshit
rare egregious
ANTONYMS

good, excellent