characteristic root of a square matrix vs eigenvalue of a matrix

characteristic root of a square matrix and eigenvalue of a matrix both are nouns.

Word	Noun	Adjective	Verb	Adverb
characteristic root of a square matrix	Yes	No	No	No
eigenvalue of a matrix	Yes	No	No	No

As nouns, characteristic root of a square matrix and eigenvalue of a matrix are synonyms defined as:

characteristic root of a square matrix and eigenvalue of a matrix: (mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant

Other synonyms of characteristic root of a square matrix include eigenvalue, eigenvalue of a square matrix.

characteristic root of a square matrix (noun)	eigenvalue of a matrix (noun)
(mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant	(mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant