tricone
tricresol
tricresyl
triction
tricycle
trident
tridymite
triethyl
triethyl-arsine
triethyl-silicoformate
  triethyl-silicol
tri-ferrous
trifluorobenzene
trifluoro-chloroethylene
trig
trigatron
trigger
trigger-bar
trigger-catch
trigger-gate
trigger-guard