9. The computer-implemented method of claim 5 , wherein the speech recognition model was further trained by determining a training corpus comprising usage examples of a plurality of words, the plurality including the first word, the second word and the variation of the second word, and wherein: determining the first characteristics comprises determining a first vector representing usage of the first word in the training corpus, determining the second characteristics comprises determining a second vector representing usage of the second word in the training corpus, and determining that the first characteristics are similar to the second characteristics comprises determining that the first vector is within a threshold distance of the second vector.
10. The computer-implemented method of claim 9 , wherein the speech recognition model was trained to recognize a subset of the plurality of words.