The word Doring is misspelled against Dooring, a noun meaning "The frame of a door."
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Dooring has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings d & ring which should not be misspelled with single 'O'
Wrong Spelling:  d-o-ring 
Correct Spelling:  d-oo-ring 
Find more incorrect spellings of Dooring to spell right way.