The word Swimer is misspelled against Swimmer, a noun meaning "A protuberance on the leg of a horse."
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Swimmer has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings swi & er which should not be misspelled with single 'M'
Wrong Spelling:  swi-m-er 
Correct Spelling:  swi-mm-er 
Find more wrongly spelled words of Swimmer to spell it well.