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.
Since each set of directions is what mathematicians call a vector, the combination is a vector sum.
Source: https://www.discovermagazine.com/the-sciences/how-animals-follow-their-nose