briquette vs briquet

briquette and briquet both are nouns.

Word	Noun	Adjective	Verb	Adverb
briquette	Yes	No	No	No
briquet	Yes	No	No	No

As nouns, briquette and briquet are synonyms defined as:

briquette and briquet: a block made from charcoal or coal dust and burned as fuel

briquette (noun)	briquet (noun)
a block made from charcoal or coal dust and burned as fuel	a block made from charcoal or coal dust and burned as fuel