Stirer or Stirrer: How To spell?
The word Stirer is misspelled against Stirrer, a noun meaning "One who, or that which, stirs something; also, one who moves about, especially after sleep; as, an early stirrer."
Stirrer has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings sti & er which should not be misspelled with single 'R'
Wrong Spelling:  sti-r-er  Correct Spelling:  sti-rr-er 
Find more wrongly spelled words of Stirrer to spell it well.