Stemer or Stemmer: How To spell?

The word Stemer is misspelled against Stemmer, a noun meaning "One who, or that which, stems (in any of the senses of the verbs)."

--> Stemmer has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings ste & er which should not be misspelled with single 'M'
Wrong Spelling:  ste-m-er 
Correct Spelling:  ste-mm-er 
Explore spell check of Stemmer to spell without errors.

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