Answer:

omicrons

Answer	Crossword Clue
OMICRONS	Vowels from Volos
OMICRONS	Greek O's
OMICRONS	Letters after xis

OMICRONS	O's, to Onassis
OMICRONS	Greek vowels
OMICRONS	Greek letters
OMICRONS	O's overseas
OMICRONS	Some letters of the Greek alphabet
OMICRONS	OOO