Tom that is a glacier as in glay-sher there is no such thing as a glassier,(reply>), Glassier is a word, as in glassy, glassier, and glassiest. Pronouncing "glacier" this way suggests it is an adjective like bouncier or spicier. Therefore, I would say the American non-homophone pronunciation is better.,(reply>), yes thank you i know that fucker i was joking,(reply>), Check your facts: glacier (US /ˈɡleɪʃər/ or UK /ˈɡlæsiə/)