the answer is trend.
Trash
triple, treble
Triple means three times as much.
tropical
Trusting
trusty, treaty, traits, trends, trendy, trades, trials
True and trustworthy are synonyms for sincere. They begin with the letters TR.
Transformers and Trollkins .
Truro.
tracy beaker
I believe it means trail.
TR means "tonne of refregeration". it is bacically the colling capacity of the a/cs.