List of 2-letter words beginning with

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There are 13 two-letter words beginning with OS

os — n. (Anatomy) Synonym of bone. — n. (Anatomy) An opening or entrance to a passage, particularly… — n. An osar or esker.
Os — n. Plural of O.
OS — prop.n. (Sports) Abbreviation of Owen Sound. — adj. Abbreviation of outsize (clothes for large people). — adj. Abbreviation of oversize.
-os — suff. Used to form plurals of some Hebrew and Yiddish loanwords…
o's — n. Plural of the letter o.
os- — pref. (Non-productive) Against; facing; a combining prefix found…
O's — n. Plural of O.
O&S — n. Initialism of olefin and surfactant.
OS. — prop.n. Abbreviation of Old Saxon.
-os- — inf. (Pharmacology) a monoclonal antibody that targets bone.
o.s. — n. (In bibliographies) Initialism of old series. — pron. (Chiefly grammar and lexicography) Initialism of oneself.
O.S. — n. Alternative form of OS.
O.␣S. — n. Alternative form of OS. — n. (Calendar systems) Abbreviation of old style.

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