On the Subject of N&Ms

Mama: “No nom-nom!” Nana: “Mama no man?”

Locate the five words on the chart below. One of these words is not in the same column or row as the other four. Select that word.

NNNMMMNMNNNNNNNMMNNNNMMNM
MMMNMMNMNMNMNNNNNMNNMNMMM
MNMMNMNNNNNMMMMNMNMMMNNNM
NMNMNNNNNMMMNMMNMMMNNNMMN
MMMMMNMNNMNNNMNNNMNMMMMMN