The word Cerebelums is misspelled against Cerebellums, which is plural of "Cerebellum"
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Cerebellums has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings cerebe & ums which should not be misspelled with single 'L'
Wrong Spelling:  cerebe-l-ums 
Correct Spelling:  cerebe-ll-ums 
Check more misspelled words of Cerebellums to spell it correct.