Illegalnes or Illegalness: How To spell?

The word Illegalnes is misspelled against Illegalness, a noun meaning "Illegality, unlawfulness."

--> Illegalness 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:  illegalne-s 
Correct Spelling:  illegalne-ss 
Explore spell check of Illegalness to spell without errors.

-->

You might be interested to know

Incredulousnes or Incredulousness?

Inharmoniousnes or Inharmoniousness?

Involuntarines or Involuntariness?