Synonyms for Indo-European (same or very similar meaning)
WordNet sense 1 (the family of languages that by 1000 BC were spoken throughout Europe and in parts of southwestern and southern Asia):
Indo-HittiteWordNet sense 2 (of or relating to the Indo-European language family):
Indo-GermanicWordNet sense 3 (of or relating to the former Indo-European people):
Indo-AryanFrom the ODE community, based on WordNetadd/edit