Childishnes or Childishness: How To spell?
The word Childishnes is misspelled against Childishness, a noun meaning "The state or quality of being childish; simplicity; harmlessness; weakness of intellect."
Childishness has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  childishne-s  Correct Spelling:  childishne-ss 
Find more wrongly spelled words of Childishness to spell it well.