Stamer or Stammer: How To spell?

The word Stamer is misspelled against Stammer, a noun meaning "Defective utterance, or involuntary interruption of utterance; a stutter."

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

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