Fissile

7 lettersadjectiverare

Updated June 2026

Definition

Describing a material capable of sustaining a nuclear fission chain reaction when struck by slow neutrons.

“Uranium-235 is a fissile isotope used as fuel in nuclear reactors.”

Pronunciation

Syllables

fis·sile

Related Words

Synonyms

fissionable

Antonyms

nonfissionablenonfissile

Word Game Tips

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Wordle

FISSILE has double S in the middle, a pattern worth testing early in your Wordle guesses

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Scrabble

F scores 4 points and the double S uses two common tiles, FISSILE is a moderate Scrabble scorer

Words Related to Fissile

Words one letter different

Change a single letter of “fissile” to make these 7-letter words — useful for Wordle and crossword clues.

missile

Words you can make from Fissile

Shorter words formed from the letters in “fissile”.

felis files flies isles issei leiss selfs sisel feil feis fels fess fiel file fili fils fise isis isle leis less lief lies life

Explore Similar Words

7-letter words starting with F 7-letter words ending with E All 7-letter words 6-letter words 8-letter words All word lists

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Dictionary References

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