Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† antŏnŏmăsĭa, ae, f., = ἀντονομασία, a rhetorical figure, by which, instead of the name, an epithet of a person is employed (e. g. instead of Scipio, Eversor Carthaginis; instead of Achilles, Pelides; instead of Juno, Saturnia, etc.), Quint. 8, 6, 29; 8, 6, 43.