premise: In one interval checked, W reveals Montague (Romeo's family name), Montmorency (a kind of cherry), Montrachet (wine), monuron (a herbicide), moon-eye (a fish), moon-eyed (open-eyed), and moonflower , as headwords not in L ; the same interval in L reveals montbretia (a plant), Montessorian (teaching method), month of Sundays , Montilla , -mony (suffix) Moog synthesizer , moon daisy (the oxeye), moon-faced , moonglow , and moonrat , which do not appear in W .  Leaving aside the plants and animals, which are differently distributed for American and British users, the only significant omission from L is Montrachet , while the important words omitted from W are Montessorian , month of Sundays , -mony , Moog synthesizer , moon-faced , and moonglow .  The last word is not in the RHD II , but it should be, for the L citation is from Henry Miller and the word also appears in the lyrics written for the popularized rendition of Tchaikovsky's 5th symphony.
hypothesis: W first and foremost reveals Romeo's family name, which is Montague