uniformity

"The school students wore a uniform of navy blue shirts and khaki pants. "

"The teacher is requiring students to submit their essays by Friday. "

"Variety is the spice of life."

"The divers encountered a huge school of mackerel."

"My life lacks excitement."

"If this store doesn't have the blue shirt I want, what are the alternatives? "

"The teacher ensured her students that the test would cover only the topics they studied in class. "

"Absence makes the heart grow fonder."

"He is a student of life."

"The sameness of the twins' personalities made it hard to tell them apart. "

"The school's student body shows a great diversity of interests and backgrounds. "

"strict embrace"