14 letters · 30 points in Scrabble
originEtymology tree Proto-Indo-European *úp Proto-Indo-European *-er Proto-Indo-European *upér Proto-Hellenic *hupér Ancient Greek ῠ̔πέρ (hŭpér) Ancient Greek ῠ̔περ- (hŭper-)der. English hyper- English efficient English hyperefficient From hyper- + efficient.
Etymology from Wiktionary, CC BY-SA 3.0