Good
Good adjective - According to the rules of logic.
Usage example: you don't need a good reason to stop doing that—it's because I said so
Illegitimate is an antonym for good.
Illegitimate
Illegitimate adjective - Contrary to or forbidden by law.
Usage example: an illegitimate use of campaign contributions for personal expenses
Nearby Words: illegitimacy, illegitimately
Both words in one sentence
-
B has been supporting an illegitimate child all this time, so he's really a good guy, honest!
Source: Love Redeems -
Joseph also makes an effort to be a good father to his illegitimate son, Josuke Higashikata, though he is somewhat impeded by his senility.
Source: Doting Parent -
When Law and Good aren't on speaking terms, however, she will consistently choose Good (because in her mind, any such Law is illegitimate).
Source: Lawful Good
Cite this Source
Illegitimate and Good. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/good/illegitimate
Good & Illegitimate. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/good/illegitimate>.
Illegitimate or Good. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/good/illegitimate.
Google Ngram Viewer shows how "good" and "illegitimate" have occurred on timeline