11 letters · 28 points in Scrabble
originEtymology tree Proto-Indo-European *wréh₂dsder. Ancient Greek ῥῐ́ζᾰ (rhĭ́ză)lbor. English rhizo- Ancient Greek σφαῖρᾰ (sphaîră)bor. Latin sphaera Late Latin sphērader. Old French spherebor. Middle English spere English sphere English -sphere English rhizosphere From rhizo- + -sphere.
Etymology from Wiktionary, CC BY-SA 3.0