The word Overgarison is misspelled against Overgarrison, a verb meaning "To garrison to excess."
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Overgarrison has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings overga & ison which should not be misspelled with single 'R'
Wrong Spelling:  overga-r-ison 
Correct Spelling:  overga-rr-ison 
Find more incorrect spellings of Overgarrison to spell right way.