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.
For instance, an excess of even the seemingly harmless transparent mucus bronchitis or allergic rhinitis; red snot can betray pneumonia.
Source: https://www.huffingtonpost.co.uk/entry/snot-colours-health_uk_657709dce4b09724b434e8f1