11 letters · 20 points in Scrabble
originEtymology tree English microbe Proto-Indo-European *kh₂eyd-der. Proto-Italic *kaidō Latin caedō Proto-Indo-European *-h₂ Proto-Indo-European *-eh₂ Proto-Italic *-ā Latin -a Latin -cīdader. Middle French -cidebor. English -cide English microbicide From microbe + -cide.
Etymology from Wiktionary, CC BY-SA 3.0