Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ōlĕăros (-us) or Ōlĭăros (-us), i, f., = Ὠλέαρος, Ὠλίαρος, one of the Cyclades, near Paros, now Antiparos, Mela, 2, 7, 11; Plin. 4, 12, 22, § 67; Verg. A. 3, 126.
Form Oliaros, Ov. M. 7, 469.
Ōlĭăros, for Olearos, q. v.