Solidnes or Solidness: How To spell?
The word Solidnes is misspelled against Solidness, a noun meaning "Soundness; strength; truth; validity, as of arguments, reasons, principles, and the like."
Solidness 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:  solidne-s  Correct Spelling:  solidne-ss 
Find more incorrect spellings of Solidness to spell right way.