The word Acustomary is misspelled against Accustomary, an adjective meaning "Usual; customary."
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Accustomary has double "cc" is mispronounced as "c"
Remember double 'CC' in between the strings A & ustomary which should not be misspelled with single 'C'
Wrong Spelling:  A-c-ustomary 
Correct Spelling:  A-cc-ustomary 
Check more misspelled words of Accustomary to spell it correct.