Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Regarding intelligence, koalas have the smallest brain-to-body ratio, an aspect that contributes to their dumbness.
Source: https://www.legit.ng/ask-legit/top/1549275-dumbest-animals-earth-feel-smart/