Synonyms of well founded in English:

well founded


See definition of well founded

adjective

1‘they have a well-founded fear of persecution if they are deported’

SYNONYMS
justifiable, justified, warranted, legitimate, defensible, supportable, sustainable, tenable, well grounded, valid, admissible, allowable, understandable, excusable, warrantable, acceptable, reasonable, logical, sensible, sound, just, bona fide, genuine, plausible, credible, believable
ANTONYMS

unjustified, groundless