An arpeggio has the notes of a chord played in succession rather than together, strictly in continuously ascending or descending order.
A broken chord is when the notes often appear in any order.
This tutorial demonstrates what an arpeggio is and how to play one on the keyboard.
Conjuct / stepwise
Disjunct / leaps
Conjuct or stepwise motion is where a melody moves by steps of either semitones or tones.
Disjunct or leaps is a melodic movement to a note further than a tone away from the previous note .
A repeated melodic idea that repeats at different pitch levels
A series of notes that are either ascending or descending, or both if using two hands on a piano (contrary motion).