The word Quidities is misspelled against Quiddities, which is plural of "Quiddity"
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Quiddities has double "dd" is mispronounced as "d"
Remember double 'DD' in between the strings Qui & ities which should not be misspelled with single 'D'
Wrong Spelling: Qui-d-ities
Correct Spelling: Qui-dd-ities
Check more misspelled words of Quiddities to spell it correct.