arpeggio
broken chord
chord
clover
common chord
concento
concord
consonant chord
deuce-ace
diminished seventh chord
dominant chord
enharmonic
leash
major triad
minor chord
set of three
seventh chord
shamrock
sixth chord
tercet
ternary
ternion
terzetto
thre
three
threesome
tierce
tonic triad
trefoil
trey
trialogue
triangle
tricorn
trident
triennium
trihedron
trilogy
trimester
trine
trinity
trinomial
trio
triphthong
triple
triple crown
triple threat
digit
figure
triadic
duad
dyad
monad
quaternion