Teasponful or Teaspoonful: How To spell?
The word Teasponful is misspelled against Teaspoonful, a noun meaning "As much as teaspoon will hold; enough to fill a teaspoon; -- usually reckoned at a fluid dram or one quarter of a tablespoonful."
Teaspoonful has double "oo" is mispronounced as "o"Remember double 'OO' in between the strings teasp & nful which should not be misspelled with single 'O'
Wrong Spelling:  teasp-o-nful  Correct Spelling:  teasp-oo-nful 
Check more misspelled words of Teaspoonful to spell it correct.