Ingrediency :: Ingrediency (n.) The quality or state of being an ingredient or component part.
Ingredient :: Ingredient (n.) That which enters into a compound, or is a component part of any combination or mixture; an element; a constituent..
Ingredient :: Ingredient (a.) Entering as, or forming, an ingredient or component part..
Regredience :: Regredience (n.) A going back; a retrogression; a return.