Differential
Part of speech: noun
Definition: the differential gear in an automobile etc a qualitative or quantitative difference between similar or comparable things an infinitesimal change in a variable, or the result of differentiation
Part of speech: adjective
Definition: of, or relating to a difference dependent on, or making a difference; distinctive having differences in speed or direction of motion of, or relating to differentiation, or the differential calculus
Example sentence: Love can reach the same level of talent, and even genius, as the discovery of differential calculus.
Quality
Part of speech: noun
Definition: Level of excellenceA property or attribute that differentiates a thing or person.In a two-phase liquid-vapor mixture, the ratio of the mass of vapor present to the total mass of the mixture.High social position.The degree to which a man-made object or system is free from bugs and flaws, as opposed to scope of functions or quantity of items.
Part of speech: adjective
Definition: Being of good worth, well made, fit for purpose.
Example sentence: It is not so much for its beauty that the forest makes a claim upon men's hearts, as for that subtle something, that quality of air that emanation from old trees, that so wonderfully changes and renews a weary spirit.