10 letters · 13 points in Scrabble
originEtymology tree English ultra- Latin rapiō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin rapidusder. Middle French rapidebor. ▲ Latin rapidusbor. English rapid English ultrarapid From ultra- + rapid.
Etymology from Wiktionary, CC BY-SA 3.0