Seleucus vs Seleucus I Nicator

Seleucus and Seleucus I Nicator both are nouns.

Word	Noun	Adjective	Verb	Adverb
Seleucus	Yes	No	No	No
Seleucus I Nicator	Yes	No	No	No

As nouns, Seleucus and Seleucus I Nicator are synonyms defined as:

Seleucus and Seleucus I Nicator: Macedonian general who accompanied Alexander the Great into Asia; founded a line of kings who reigned in Asia Minor until 65 BC (358-281 BC)

Other synonyms of Seleucus include Seleucus I.

Seleucus (noun)	Seleucus I Nicator (noun)
Macedonian general who accompanied Alexander the Great into Asia; founded a line of kings who reigned in Asia Minor until 65 BC (358-281 BC)	Macedonian general who accompanied Alexander the Great into Asia; founded a line of kings who reigned in Asia Minor until 65 BC (358-281 BC)