algorism /alˈgə-ri-zm/

1. The Arabic system of numeration
2. Arithmetic
3. An algorithm

• quadragenary
• Quadragesima
• quadragesimal
• quadrangle
• quadrangles
• quadrangular
• quadrangularly
• quadrans
• quadrant
• quadrantal
• quadrantes
• quadrants
• quadraphonic
• quadraphonics
• quadraphony
• quadraplegia
• quadrat
• quadrate
• quadrate B
• quadrated
• quadrates
• quadratic
• quadratical
• quadratic mean
• quadratics