13 letters · 18 points in Scrabble
noun growth by the rapid multiplication of parts
noun a rapid increase in number (especially a rapid increase in the number of deadly weapons)
originEtymology tree French proliférer Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ation Middle French -ation French -ation French proliférationbor. English proliferation Borrowed from French prolifération.
Etymology from Wiktionary, CC BY-SA 3.0