The word Gromsmen is misspelled against Groomsmen, which is plural of "Groomsman"
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Groomsmen has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings gr & msmen which should not be misspelled with single 'O'
Wrong Spelling:  gr-o-msmen 
Correct Spelling:  gr-oo-msmen 
Find more incorrect spellings of Groomsmen to spell right way.