| BREASTSUMMERS | • breastsummers n. Plural of breastsummer. • BREASTSUMMER n. a beam supporting the front of a building, also BRESSUMMER. |
| COSMOCHEMISTS | • cosmochemists n. Plural of cosmochemist. • COSMOCHEMIST n. one who practises cosmochemistry. |
| DISSYMMETRIES | • dissymmetries n. Plural of dissymmetry. • DISSYMMETRY n. the absence of or the lack of symmetry. |
| EMPRESSEMENTS | • empressements n. Plural of empressement. • EMPRESSEMENT n. (French) extreme politeness. |
| IMMERSIONISTS | • immersionists n. Plural of immersionist. • IMMERSIONIST n. a person who favours or practises baptism by immersion. |
| MESOGNATHISMS | • MESOGNATHISM n. the state of having slightly projecting jaws, also MESOGNATHY. |
| METASOMATISMS | • metasomatisms n. Plural of metasomatism. • METASOMATISM n. metamorphism caused chiefly by introduction of fluids and/or ions. |
| METASOMATOSES | • METASOMATOSIS n. change in the composition of a rock or mineral by the addition or replacement of chemicals. |
| METASOMATOSIS | • metasomatosis n. (Geology) metasomatism. • METASOMATOSIS n. change in the composition of a rock or mineral by the addition or replacement of chemicals. |
| MISSTATEMENTS | • misstatements n. Plural of misstatement. • MISSTATEMENT n. a false statement. |
| MOMENTOUSNESS | • momentousness n. The quality of being momentous. • MOMENTOUS n. of great consequence. |
| POSTFEMINISMS | • postfeminisms n. Plural of postfeminism. • POSTFEMINISM n. a movement that regards the main principles of feminism as either achieved or misguided and seeks a new programme. |
| SEISMOMETRIES | • SEISMOMETRY n. the scientific study of earthquakes. |
| SEMIBASEMENTS | • SEMIBASEMENT n. a basement partly above ground, as in a house built on a slope. |
| SHAMATEURISMS | • SHAMATEURISM n. the retention of amateur status while receiving payment for playing or competing. |
| SPRECHSTIMMES | • SPRECHSTIMME n. (German) music using the sprechgesang form of vocalization. |
| SYMMETALLISMS | • SYMMETALLISM n. a system of coinage in which the unit of currency consists of a particular weight of an alloy of two or more metals, also SYMMETALISM. |
| SYMPTOMATISES | • SYMPTOMATISE v. to be a symptom of, also SYMPTOMATIZE. |