The word Anihilatory is misspelled against Annihilatory, an adjective meaning "Annihilative."
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Annihilatory has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings a & ihilatory which should not be misspelled with single 'N'
Wrong Spelling:  a-n-ihilatory 
Correct Spelling:  a-nn-ihilatory 
Find more incorrect spellings of Annihilatory to spell right way.