Irish county, from Irish Tir Eoghain "Eoghan's Land," from Eoghan "Owen," ancestor of the O'Neills, who owned land here. Tir also forms the final syllable in Leinster, Munster, Ulster.
tyrant
tyre
Tyrian
tyro
Tyrol
Tyrone
tyrosine
Tyrrhenian
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U.K.
U.N.