Teresa vs Theresa

Teresa and Theresa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Teresa	Yes	No	No	No
Theresa	Yes	No	No	No

As nouns, Teresa and Theresa are synonyms defined as:

Teresa and Theresa: Indian nun and missionary in the Roman Catholic Church (born of Albanian parents in what is now Macedonia); dedicated to helping the poor in India (1910-1997)

Other synonyms of Teresa include Agnes Gonxha Bojaxhiu, Mother Teresa, Mother Theresa.

Teresa (noun)	Theresa (noun)
Indian nun and missionary in the Roman Catholic Church (born of Albanian parents in what is now Macedonia); dedicated to helping the poor in India (1910-1997)	Indian nun and missionary in the Roman Catholic Church (born of Albanian parents in what is now Macedonia); dedicated to helping the poor in India (1910-1997)