| CRUSTATIONS | • crustations n. Plural of crustation. • CRUSTATION n. an adherent crust. |
| INSTITUTORS | • institutors n. Plural of institutor. • INSTITUTOR n. one who institutes, also INSTITUTER. |
| INSTRUCTORS | • instructors n. Plural of instructor. • INSTRUCTOR n. one that instructs. |
| INTROITUSES | • introituses n. Plural of introitus. • INTROITUS n. (Latin) the entrance to a cavity or hollow organ e.g. the vagina. |
| LUSTRATIONS | • lustrations n. Plural of lustration. • LUSTRATION n. ritual washing; ablution. |
| SATURATIONS | • saturations n. Plural of saturation. • SATURATION n. complete infiltration. |
| STRENUOSITY | • strenuosity n. The quality or state of being strenuous. • STRENUOSITY n. the state of being strenuous. |
| STUBBORNEST | • stubbornest adj. Superlative form of stubborn: most stubborn. • STUBBORN adj. obstinate. |
| STUNTPERSON | • stuntperson n. A stuntman or stuntwoman; a person who performs stunts (for films). |
| STUPRATIONS | • stuprations n. Plural of stupration. • STUPRATION n. (archaic) rape, violation. |
| SUSTENTATOR | • sustentator n. A sustaining part or structure. • SUSTENTATOR n. a sustaining part or structure. |
| SUTURATIONS | • suturations n. Plural of suturation. • SUTURATION n. the act of applying sutures. |
| TITANOSAURS | • titanosaurs n. Plural of titanosaur. • TITANOSAUR n. a very large dinosaur. |
| TONGUESTERS | • tonguesters n. Plural of tonguester. • TONGUESTER n. one who uses his tongue; a gossip. |
| TROUTSTONES | • TROUTSTONE n. a coarse-grained basic igneous rock composed of feldspar speckled with olivine, aka troctolite. |