1) Classical 2) Graeco-roman 3) Greco-roman 4) Greek 5) Of Greece and Greeks 1) Classical 2) Grecian 3) Greco 4) Greek 5) Hellenistic 6) Hellenistical 7) Koine 
• (a.) Of or pertaining to the Hellenes, or inhabitants of Greece; Greek; Grecian. • (n.) The dialect, formed with slight variations from the Attic, which prevailed among Greek writers after the time of Alexander.
In linguistics, the branch of Indo-European including classical and modern Greek.
Hel·len'ic adjective [ Greek ..., ..., from ... the Greeks.] Of or pertaining to the Hellenes, or inhabitants of Greece; Greek; Grecian. 'The Hellenic forces.' Jowett (Thucyd. ). Hel·len'ic noun The dialect, formed with slight variations from the Attic, which prevailed among Greek writers after the time of Alexander. 
[adj] - relating to or characteristic of the classical Greek civilization
Hellenistic adjective relating to or characteristic of the classical Greek civilization