Tren or Treen: How To spell?
The word Tren is misspelled against Treen, an adjective meaning "Made of wood; wooden."
Treen has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Tr & n which should not be misspelled with single 'E'
Wrong Spelling:  Tr-e-n  Correct Spelling:  Tr-ee-n 
Explore spell check of Treen to spell without errors.