Señor vs Senor

Señor and Senor both are nouns.

Word	Noun	Adjective	Verb	Adverb
Señor	Yes	No	No	No
Senor	Yes	No	No	No

As nouns, Señor and Senor are synonyms defined as:

Señor and Senor: a Spanish title or form of address for a man; similar to the English `Mr' or `sir'

Señor (noun)	Senor (noun)
a Spanish title or form of address for a man; similar to the English `Mr' or `sir'	a Spanish title or form of address for a man; similar to the English `Mr' or `sir'