Synonyms of observant in English:

observant


See US English definition of observant

See UK English definition of observant

See Spanish definition of observador

adjective

1‘lifeguards should be observant and stop risky situations before they start’

SYNONYMS
alert, sharp-eyed, sharp, eagle-eyed, hawk-eyed, with eyes like a hawk, keen-eyed, watchful, on the lookout, on the qui vive, on guard, attentive, vigilant, hypervigilant, with one's eyes open, with one's eyes peeled, with one's eyes skinned, awake, heedful, mindful, focused, aware
informal beady-eyed, not missing a trick, on the ball
rare regardful
ANTONYMS

inattentive, dreamy

2‘an observant Jew’

SYNONYMS
practising, obedient, dutiful, conformist, conforming
committed, devout, orthodox, law-abiding