S: (n) adulterant, adulterator (any substance that lessens the purity or effectiveness of a substance) "it is necessary to remove the adulterants before use"
S: (n) fomentation (a substance used as a warm moist medicinal compress or poultice)
S: (n) fuel (a substance that can be consumed to produce energy) "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft"
S: (n) humectant (any substance that is added to another substance to keep it moist)
S: (n) inoculant, inoculum (a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease)
S: (n) jelly (any substance having the consistency of jelly or gelatin)
S: (n) leaven, leavening (a substance used to produce fermentation in dough or a liquid)
S: (n) refrigerant (any substance used to provide cooling (as in a refrigerator))
S: (n) lysin (any substance (such as an antibody) or agent that can cause lysis)
S: (n) solid (matter that is solid at room temperature and pressure)
S: (n) food, solid food (any solid substance (as opposed to liquid) that is used as a source of nourishment) "food and drink"
S: (n) precipitate (a precipitated solid substance in suspension or after settling or filtering)
S: (n) plastic (generic name for certain synthetic or semisynthetic materials that can be molded or extruded into objects or films or filaments or used for making e.g. coatings and adhesives)
S: (n) glass (a brittle transparent solid with irregular atomic structure)
S: (n) crystal (a solid formed by the solidification of a chemical and having a highly regular atomic structure)