pentad /penˈtad/

1. A set of five things
2. A period of five years or five days
3. An atom, element or radical with a combining power of five

• square deal
• square deals
• square-eyed
• square eyes
• square-face
• square feet
• square foot
• squarehead
• squareheads
• square inch
• square inches
• square knot
• square knots
• square leg
• square legs
• square-lipped rhinoceros
• squarely
• square matrices
• square matrix
• square matrixes
• square meal
• square meals
• square measure
• square measures
• square metre