foehn vs fohn

foehn and fohn both are nouns.

Word	Noun	Adjective	Verb	Adverb
foehn	Yes	No	No	No
fohn	Yes	No	No	No

As nouns, foehn and fohn are synonyms defined as:

foehn and fohn: a warm dry wind that blows down the northern slopes of the Alps

foehn (noun)	fohn (noun)
a warm dry wind that blows down the northern slopes of the Alps	a warm dry wind that blows down the northern slopes of the Alps