Plunness or Plainness: How To spell?
The word Plunness is misspelled against Plainness, a noun meaning "The quality or state of being plain."
Word contains consecutive vowels 'AI' in between alphabets pl & nness is misspelled as 'U'Wrong Spelling:  pl-u-nness  Correct Spelling:  pl-ai-nness 
Check more misspelled words of Plainness to spell it correct.