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
trigger-housing
triggering
trigger-lever
trigger-pin