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.