Noun

• S: (n) Aryan, Indo-European (a member of the prehistoric people who spoke Proto-Indo European)
• S: (n) Indo-European, Indo-European language, Indo-Hittite (the family of languages that by 1000 BC were spoken throughout Europe and in parts of southwestern and southern Asia)
• direct hyponym / full hyponym
• S: (n) Proto-Indo European, PIE (a prehistoric unrecorded language that was the ancestor of all Indo-European languages)
• S: (n) Albanian (the Indo-European language spoken by the people of Albania)
• S: (n) Armenian, Armenian language (the Indo-European language spoken predominantly in Armenia, but also in Azerbaijan)
• S: (n) Illyrian (a minor and almost extinct branch of the Indo-European languages; spoken along the Dalmatian coast)
• S: (n) Thraco-Phrygian (an extinct branch of the Indo-European language family thought by some to be related to Armenian)
• S: (n) Balto-Slavic, Balto-Slavic language, Balto-Slavonic (a family of Indo-European languages including the Slavic and Baltic languages)
• S: (n) Germanic, Germanic language (a branch of the Indo-European family of languages; members that are spoken currently fall into two major groups: Scandinavian and West Germanic)
• S: (n) Celtic, Celtic language (a branch of the Indo-European languages that (judging from inscriptions and place names) was spread widely over Europe in the pre-Christian era)
• S: (n) Italic, Italic language (a branch of the Indo-European languages of which Latin is the chief representative)
• S: (n) Tocharian (a branch of the Indo-European language family that originated in central Asia during the first millennium A.D.)
• S: (n) Indo-Iranian, Indo-Iranian language (the branch of the Indo-European family of languages including the Indic and Iranian language groups)
• S: (n) Anatolian, Anatolian language (an extinct branch of the Indo-European family of languages known from inscriptions and important in the reconstruction of Proto-Indo European)
• S: (n) Greek, Hellenic, Hellenic language (the Hellenic branch of the Indo-European family of languages)
• direct hypernym / inherited hypernym / sister term

Adjective

• S: (adj) Indo-European, Indo-Germanic (of or relating to the Indo-European language family)
• S: (adj) Indo-European, Indo-Aryan, Aryan (of or relating to the former Indo-European people) "Indo-European migrations"