Double Neighbor Tones Decorates a single pitch, has to come back to the original pitch.
Appoggiatura (APP) Approached by leap and left by step in the opposite direction.
Escape Tone (ET) Approached by step and left by leap in the opposite direction.
appoggiaturas and escape tones are the most common NCT’s
Anticipations (ANT) A reverse suspension, although not upsidedown like retardations. Putting your car in reverse doesn’t put it on its roof.
Pedals (PED) Any non chord tone approached by static motion and left by static motion across at least three chords. When labeling with a pedal, use the next voice up to determine inversion.
“Figure” It has the right shape, but aren’t non-chord tones. This concept can apply to any NCT. Check if they’re chord tones! *ex: There’s an appoggiatura figure in [insert random piece], measure 21.