Accented Passing Tone: A non-chord tone that occurs between two chord tones, where the pitch of the passing tone moves by leap instead of stepwise. It creates a stronger sense of tension and resolution compared to an unaccented passing tone.
Neighboring Tone: Also known as "neighbor note," it is a non-chord tone that occurs when a pitch is approached by step from above or below, then returns to its original pitch. It adds ornamentation and embellishment to a melody.
Suspension: A type of non-chord tone where a pitch from the previous chord is held over into the next chord, creating dissonance which resolves downward by step. It creates tension and release in music.