Substance
Part of speech: noun
Definition: Physical matter; material. The essential part of anything; the most vital part. Considerable wealth or resources. drugs
Example sentence: The very substance of the ambitious is merely the shadow of a dream.
Matter
Part of speech: verb
Definition: To be important.To care about, to mind; to find important.
Part of speech: noun
Definition: The basic structural component of the universe. Matter usually has mass and volume.Matter made up of normal particles, not antiparticles. (Non-antimatter matter).A kind of substance.A reason for concern; being amiss.A situation.A cause.Written material (especially in books or magazines)Gray and white matter are the two nerve tissue types that comprise the brain and spinal cord.
Example sentence: Life was always a matter of waiting for the right moment to act.