WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / F / fusion reactor fusion reactor noun 4 syllables 14 letters Scrabble 18 WWF 21 Definitions noun a nuclear reactor that uses controlled nuclear fusion to generate energy thermonuclear reactor Look “fusion reactor” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →