andiron
chain
clover
coal tongs
crane
crook
damper
deuce-ace
fire hook
fire tongs
firedog
grate
grating
grid
griddle
gridiron
grill
griller
leash
lifter
poker
pothook
salamander
set of three
shamrock
spit
tercet
ternary
ternion
terzetto
three
threesome
tierce
tongs
trefoil
trey
triad
trialogue
triangle
tricorn
trident
triennium
trihedron
trilogy
trimester
trine
trinity
trinomial
trio
triphthong
trevat
base
pedestal
stand
ambry
amphorae
appliqué
bipod
boiling point
bookend
center-table
cookware
elbowchair
flagship
gallipot
growler
handspikes
industrials
panelling
pannel
percolator
pikestaff
praying-stool
sea-chest
stairway
switchblade
thumbscrew
triptych
þber