Smothen or Smoothen: How To spell?

The word Smothen is misspelled against Smoothen, a verb meaning "To make smooth."

Smoothen has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings sm & then which should not be misspelled with single 'O'
Wrong Spelling:  sm-o-then 
Correct Spelling:  sm-oo-then 
Find more incorrect spellings of Smoothen to spell right way.

You might be interested to know

Spermatozon or Spermatozoon?

Strot or Stroot?

Toted or Tooted?