- tweezers
- twelfth
- twelve
- twelve-punch
- twentieth
twenty
- twenty-four hours a day
- twenty-four-hour
- twenty-one
- twice
- twice a month
- twice a week
- twiddle
- twiddle one's thumbs
- twiddle with
- twig
- twig s.th.
- twilight
- twilight switch
- twill
- twin
- twin antenna
- twin bed
- twin beds
- twin computer system
- twin contact
- twin crystal
- twin delta loop
- twin dipole
- twin lamp indicator
- twin lead

