Imatureness or Immatureness: How To spell?
The word Imatureness is misspelled against Immatureness, a noun meaning "The state or quality of being immature; immaturity."
Immatureness has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings i & atureness which should not be misspelled with single 'M'
Wrong Spelling:  i-m-atureness  Correct Spelling:  i-mm-atureness 
Check more misspelled words of Immatureness to spell it correct.