The word Throbing is misspelled against Throbbing, which is present continuous of "Throb"
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Throbbing has double "bb" is mispronounced as "b"
Remember double 'BB' in between the strings Thro & ing which should not be misspelled with single 'B'
Wrong Spelling: Thro-b-ing
Correct Spelling: Thro-bb-ing
Find more incorrect spellings of Throbbing to spell right way.