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.
And if we’re talking about a particular object, say a black hole binary system called GX339-4, and it’s only five thousandths as bright as the Crab, we say it’s 5 milliCrab bright.