The word Sacelum is misspelled against Sacellum, a noun meaning "A small monumental chapel in a church."
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Sacellum has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings sace & um which should not be misspelled with single 'L'
Wrong Spelling:  sace-l-um 
Correct Spelling:  sace-ll-um 
Check more misspelled words of Sacellum to spell it correct.