12 letters · 23 points in Scrabble
noun any of various chiefly deciduous ornamental shrubs of the genus Philadelphus having white sweet-scented flowers, single or in clusters; widely grown in temperate regions
originBorrowed from translingual Philadelphus, from Latin Philadelphus, Ancient Greek Φιλάδελφος (Philádelphos), φιλάδελφος (philádelphos).
Etymology from Wiktionary, CC BY-SA 3.0