Synonyms:
- Little Joe,
- biquadrate,
- biquadratic,
- four,
- four-legged,
- four-part diaphony,
- four-rayed,
- foursome,
- foursquare,
- quad,
- quadrangle,
- quadrature,
- quadrennium,
- quadric,
- quadrilateral,
- quadrille,
- quadrinomial,
- quadrivalent,
- quadruped,
- quadruplet,
- quartet,
- quartic,
- quartile,
- quatern,
- quaternion,
- quaternity,
- quatrefoil,
- rectangle,
- square,
- square dance,
- squaring,
- tetractinal,
- tetrad,
- tetragon,
- tetragram,
- tetragrammaton,
- tetrahedron,
- tetralogy,
- tetraphony,
- tetrapody,
- tetravalent