Spinaker or Spinnaker: How To spell?
The word Spinaker is misspelled against Spinnaker, a noun meaning "A large triangular sail set upon a boom, -- used when running before the wind."
Spinnaker has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings spi & aker which should not be misspelled with single 'N'
Wrong Spelling:  spi-n-aker  Correct Spelling:  spi-nn-aker 
Find more wrongly spelled words of Spinnaker to spell it well.