Cotonwood or Cottonwood: How To spell?
The word Cotonwood is misspelled against Cottonwood, a noun meaning "An American tree of the genus Populus or poplar, having the seeds covered with abundant cottonlike hairs; esp., the P. monilifera and P. angustifolia of the Western United States."
Cottonwood has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings co & onwood which should not be misspelled with single 'T'
Wrong Spelling:  co-t-onwood  Correct Spelling:  co-tt-onwood 
Find more incorrect spellings of Cottonwood to spell right way.