11 letters · 20 points in Scrabble
originEtymology tree Proto-Indo-European *mey-der.? Ancient Greek μικρός (mikrós)der. English micro- Ancient Greek σφαῖρᾰ (sphaîră)bor. Latin sphaera Late Latin sphērader. Old French spherebor. Middle English spere English sphere English microsphere From micro- + sphere.
Etymology from Wiktionary, CC BY-SA 3.0