We don't have synonyms for fusel yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are fuel, fuse and fused.
(n) :
Ellipsis of fusel oil [A mixture of several higher-order alcohols (having more than two carbon atoms) formed as byproduct in the normal fermentation process, captured as part of the tailings in distillation. An excessive concentration, as in low-quality moonshine, causes unpleasant taste.]
(n) :
Ellipsis of fusel oil [A mixture of several higher-order alcohols (having more than two carbon atoms) formed as byproduct in the normal fermentation process, captured as part of the tailings in distillation. An excessive concentration, as in low-quality moonshine, causes unpleasant taste.]