εὔστομοί εὔστομος, with mouth of good size Morpho works with a static database. If you like, you can compare the output of Morpheus.Parsed as: feminine nominative plural (morph21) feminine vocative plural (morph21) masculine nominative plural (morph21) masculine vocative plural (morph21) of εὔστομος εὔστομος Plural Neuter Nominative εὔστομα Genitive – Dative – Accusative εὔστομʼ Vocative –