tempo is the speed or pace of a given piece. In classical music, tempo is typically indicated with an instruction at the start of a piece and is usually measured in beats per minute
timbre
the character or quality of a musical sound or voice as distinct from its pitch and intensity
melody, also tune, voice or line, is a linear succession of musical tones that the listener perceives as a single entity. In its most literal sense, a melody is a combination of pitch and rhythm, while more figuratively, the term can include successions of other musical elements such as tonal color
Rhythm generally means a "movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions".
Harmony, in music, the sound of two or more notes heard simultaneously. ... In a narrower sense, harmony refers to the extensively developed system of chords and the rules that allow or forbid relations between chords that characterizes Western music.
Dynamics means how quietly or loudly a piece of music should be played. Dynamics are an important way of conveying the mood of a piece and your use of dynamics is a marked element of your performance. Composers use dynamics to change the mood.
form refers to the structure of a musical composition or performance
