flugelhorn vs fluegelhorn

flugelhorn and fluegelhorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
flugelhorn	Yes	No	No	No
fluegelhorn	Yes	No	No	No

As nouns, flugelhorn and fluegelhorn are synonyms defined as:

flugelhorn and fluegelhorn: a brass instrument resembling a cornet but with a wider bore

flugelhorn (noun)	fluegelhorn (noun)
a brass instrument resembling a cornet but with a wider bore	a brass instrument resembling a cornet but with a wider bore