The word Nucle is misspelled against Nuclei, which is plural of "Nucleus"
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Word end with consecutive vowels 'EI' preceded by alphabets 'nucl' is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  nucl-e 
Correct Spelling:  nucl-ei 
Check more misspelled words of Nuclei to spell it correct.