Trenail or Treenail: How To spell?
The word Trenail is misspelled against Treenail, a noun meaning "A long wooden pin used in fastening the planks of a vessel to the timbers or to each other."
Treenail has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Tr & nail which should not be misspelled with single 'E'
Wrong Spelling:  Tr-e-nail  Correct Spelling:  Tr-ee-nail 
Find more wrongly spelled words of Treenail to spell it well.