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.
Perhaps most surprising was BS&P's objection to the term "assassin," though, given how often that word was used in the first season's "Days of Future Past" two-parter.
Source: https://www.cbr.com/history-xmen-animated-series-adaptation-marvel-comics/