The word Cocyges is misspelled against Coccyges, which is plural of "Coccyx"
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Coccyges has double "cc" is mispronounced as "c"
Remember double 'CC' in between the strings Co & yges which should not be misspelled with single 'C'
Wrong Spelling:  Co-c-yges 
Correct Spelling:  Co-cc-yges 
Find more incorrect spellings of Coccyges to spell right way.