Learn the phonetics of each letter, and you can literally speak any word.
Learn the phonetics of each letter, and you can literally speak any word.
English is filled with homophones, and while you can almost always figure out which variant is meant through context, in writing the opportunity is reduced. (You can't ask a book a follow-up question.)
Minimal research turned up two lists. One only lists groups of n > 2 (88 triples; 24 quadruples; 2 quintuples; 1 sextet; and 1 septet) [0]. The other is for British English (441 groups) [1].
Your example, by the way, is a particularly interesting case! From the Wikipedia page [2]: 17% of Americans (primarily in the Northeast and most clearly in Philadelphia, New York City, and Rhode Island) pronounce each distinctly, with a further 26% merging only 2/3 pronunciations. Accordingly, their distinct IPA pronunciations are /ˈme(ə)ɹi/, /ˈmæɹi/, /ˈmɛɹi/, respective to your ordering (the last, merry, is the one we've converged on). More frustrating still, the list of "multinyms" in [0] excludes this example so it's especially difficult to know how many there may be in practice.
[0] https://web.archive.org/web/20160825095711/http://people.sc....
[1] http://www.singularis.ltd.uk/bifroest/misc/homophones-list.h...
[2] https://en.wikipedia.org/wiki/English-language_vowel_changes...