11 letters · 12 points in Scrabble
noun repetitive nonmeaningful speech (especially that associated with a trance state or religious fervor)
originFrom glosso- + -lalia, from Ancient Greek γλῶσσᾰ (glôssă, “tongue; language”) (ultimately from Proto-Indo-European *glōgʰs) + λᾰλῐᾱ́ (lălĭā́, “talking; form of speech, dialect”) (from λᾰ́λος (lắlos, “talkative”) + -ῐ́ᾱ (-ĭ́ā, suffix forming feminine abstract nouns)).
Etymology from Wiktionary, CC BY-SA 3.0