Karttikeya vs Kartikeya

Karttikeya and Kartikeya both are nouns.

Word	Noun	Adjective	Verb	Adverb
Karttikeya	Yes	No	No	No
Kartikeya	Yes	No	No	No

As nouns, Karttikeya and Kartikeya are synonyms defined as:

Karttikeya and Kartikeya: Hindu god of bravery; Hindu god of war; commander-in-chief of the army of the gods; son of Shiva and Parvati

Other synonyms of Karttikeya include Skanda.

Karttikeya (noun)	Kartikeya (noun)
Hindu god of bravery; Hindu god of war; commander-in-chief of the army of the gods; son of Shiva and Parvati	Hindu god of bravery; Hindu god of war; commander-in-chief of the army of the gods; son of Shiva and Parvati