Sturdines or Sturdiness: How To spell?
The word Sturdines is misspelled against Sturdiness, a noun meaning "Quality of being sturdy."
Sturdiness 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:  sturdine-s  Correct Spelling:  sturdine-ss 
Check more misspelled words of Sturdiness to spell it correct.