Bittiest is an adjective that describes something very small or tiny. It is possible to find antonyms for bittiest by looking for words that describe something large or substantial. Antonyms for bittiest may include terms like colossal, giant, gargantuan, mammoth, immense or substantial. Other antonyms for bittiest could be phrases like spacious, expansive, capacious or voluminous, as they describe spaces or objects that are large or roomy. Ultimately, finding the antonyms for bittiest depends on the context in which it is used and the specific qualities of the objects or spaces being compared.