Demetrius Poliorcetes vs Demetrius

Demetrius Poliorcetes and Demetrius both are nouns.

Word	Noun	Adjective	Verb	Adverb
Demetrius Poliorcetes	Yes	No	No	No
Demetrius	Yes	No	No	No

As nouns, Demetrius Poliorcetes and Demetrius are synonyms defined as:

Demetrius Poliorcetes and Demetrius: son of Antigonus Cyclops and king of Macedonia; he and his father were defeated at the battle of Ipsus (337-283 BC)

Other synonyms of Demetrius Poliorcetes include Demetrius I, Demetrius I of Macedon.

Demetrius Poliorcetes (noun)	Demetrius (noun)
son of Antigonus Cyclops and king of Macedonia; he and his father were defeated at the battle of Ipsus (337-283 BC)	son of Antigonus Cyclops and king of Macedonia; he and his father were defeated at the battle of Ipsus (337-283 BC)