Heartwod or Heartwood: How To spell?
The word Heartwod is misspelled against Heartwood, a noun meaning "The hard, central part of the trunk of a tree, consisting of the old and matured wood, and usually differing in color from the outer layers. It is technically known as duramen, and distinguished from the softer sapwood or alburnum."
Heartwood has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings heartw & d which should not be misspelled with single 'O'
Wrong Spelling:  heartw-o-d  Correct Spelling:  heartw-oo-d 
Find more incorrect spellings of Heartwood to spell right way.