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.
I did get one file-system read error during a backup, but hitting allowed the operation to complete.
Source: https://www.pcworld.com/article/819871/novabackup-review.html