Charles vs Charles I

Charles and Charles I both are nouns.

Word	Noun	Adjective	Verb	Adverb
Charles	Yes	No	No	No
Charles I	Yes	No	No	No

As nouns, Charles and Charles I are synonyms defined as:

Charles and Charles I: king of the Franks and Holy Roman Emperor; conqueror of the Lombards and Saxons (742-814)

Other synonyms of Charles include Carolus, Charlemagne, Charles the Great.

As nouns, Charles and Charles I are synonyms defined as:

Charles and Charles I: son of James I who was King of England and Scotland and Ireland; was deposed and executed by Oliver Cromwell (1600-1649)

Other synonyms of Charles include Charles I of England, Charles Stuart.

As nouns, Charles and Charles I are synonyms defined as:

Charles and Charles I: as Charles II he was Holy Roman Emperor and as Charles I he was king of France (823-877)

Other synonyms of Charles include Charles II, Charles the Bald.

Charles (noun)	Charles I (noun)
a river in eastern Massachusetts that empties into Boston Harbor and that separates Cambridge from Boston	son of James I who was King of England and Scotland and Ireland; was deposed and executed by Oliver Cromwell (1600-1649)
the eldest son of Elizabeth II and heir to the English throne (born in 1948)	king of the Franks and Holy Roman Emperor; conqueror of the Lombards and Saxons (742-814)
French physicist and author of Charles's law which anticipated Gay-Lussac's law (1746-1823)	as Charles II he was Holy Roman Emperor and as Charles I he was king of France (823-877)
king of the Franks and Holy Roman Emperor; conqueror of the Lombards and Saxons (742-814)
son of James I who was King of England and Scotland and Ireland; was deposed and executed by Oliver Cromwell (1600-1649)
King of England and Scotland and Ireland during the Restoration (1630-1685)
as Charles II he was Holy Roman Emperor and as Charles I he was king of France (823-877)
King of France who began his reign with most of northern France under English control; after the intervention of Jeanne d'Arc the French were able to defeat the English and end the Hundred Years' War (1403-1461)
King of France from 1560 to 1574 whose reign was dominated by his mother Catherine de Medicis (1550-1574)