| GRASSQUITS | • grassquits n. Plural of grassquit. • GRASSQUIT n. a tropical American finch. |
| SINARQUISMS | • SINARQUISM n. the fascist movement in Mexico, prominent around the time of the Second World War, also SINARCHISM. |
| SINARQUISTS | • Sinarquists n. Plural of Sinarquist. • SINARQUIST n. a member of the fascist movement in Mexico, prominent around the time of the Second World War, also SINARCHIST. |
| SESQUIALTERS | • SESQUIALTER n. a mixture stop on an organ. |
| SQUARISHNESS | • squarishness n. The state or quality of being squarish. • SQUARISHNESS n. the state of being squarish. |
| QUAESTORSHIPS | • quaestorships n. Plural of quaestorship. • QUAESTORSHIP n. the office of quaestor, also QUESTORSHIP. |
| QUASICRYSTALS | • quasicrystals n. Plural of quasicrystal. • quasi-crystals n. Plural of quasi-crystal. • QUASICRYSTAL n. a body of solid material that resembles a crystal in being composed of repeating structural units but that incorporates two or more unit cells into a quasiperiodic structure. |
| SESQUIALTERAS | • sesquialteras n. Plural of sesquialtera. • SESQUIALTERA n. a perfect fifth; three notes against two; an organ stop giving the root, the twelfth and the tierce. |
| SESQUITERTIAS | • sesquitertias n. Plural of sesquitertia. • SESQUITERTIA n. a perfect fourth; a rhythm of three notes against four. |
| EQUESTRIANISMS | • equestrianisms n. Plural of equestrianism. • EQUESTRIANISM n. horsemanship. |
| SEQUESTRATIONS | • sequestrations n. Plural of sequestration. • SEQUESTRATION n. seizure of goods or property by the authority of a writ. |
| SQUARISHNESSES | • SQUARISHNESS n. the state of being squarish. |
| TRANQUILNESSES | • TRANQUILNESS n. the state of being tranquil. |
| QUARTERMISTRESS | • quartermistress n. A female quartermaster. • QUARTERMISTRESS n. a female quartermaster. |