Señora vs Senora

Señora and Senora both are nouns.

Word	Noun	Adjective	Verb	Adverb
Señora	Yes	No	No	No
Senora	Yes	No	No	No

As nouns, Señora and Senora are synonyms defined as:

Señora and Senora: a Spanish title or form of address for a married woman; similar to the English `Mrs' or `madam'

Señora (noun)	Senora (noun)
a Spanish title or form of address for a married woman; similar to the English `Mrs' or `madam'	a Spanish title or form of address for a married woman; similar to the English `Mrs' or `madam'