10 letters · 14 points in Scrabble
noun complete and wholehearted fidelity
noun a ceremony in which something (as a building) is dedicated to some goal or purpose
noun a message that makes a pledge
originOriginated 1350–1400 from Middle English dedicacioun, from Old French dedicacion (“consecration of a church or chapel”), from Latin dēdicātiō, equivalent to dēdicātus+-iōn.
Etymology from Wiktionary, CC BY-SA 3.0