The electronic text gives the secondary headword eu)ru/xoros as the lemma.
[1] Comparably, according to Adler, in the Ambrosian Lexicon. The headword -- a single abstract noun in the Greek -- is generally found in the lower case (examples in LSJ s.v.), but note also Genesis 26.22 LXX: Isaac calls a newly-dug well Eurychoria (Rehoboth in the Hebrew).
[2] Epic/poetic adjective (third syllable omicron rather than the headword's omega), often used as an epithet of named places: so e.g. Mykalessos (Homer, Iliad 2.498), Elis (Odyssey 4.635), Thebes (Odyssey 11.265), Sparta (Odyssey 13.414 & 15.1).