11 letters · 14 points in Scrabble
originEtymology tree English register Proto-Indo-European *-tḗr Proto-Indo-European *-dʰlom Proto-Indo-European *-dʰlis Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English registrable From register + -able (“able, capable”).
Etymology from Wiktionary, CC BY-SA 3.0