Antonyms of adj treacly

1 sense of treacly

Sense 1
cloying, saccharine, syrupy, treacly -- (overly sweet)

INDIRECT (VIA sweet) -> sour -- (having a sharp biting taste)

Similarity of adj treacly

1 sense of treacly

Sense 1
cloying, saccharine, syrupy, treacly -- (overly sweet)
       => sweet (vs. sour) -- (having or denoting the characteristic taste of sugar)