transmontane vs tramontane

transmontane is not a noun while tramontane is a noun.

Word	Noun	Adjective	Verb	Adverb
transmontane	No	Yes	No	No
tramontane	Yes	Yes	No	No

As adjectives, transmontane and tramontane are synonyms defined as:

transmontane and tramontane: on or coming from the other side of the mountains (from the speaker)

transmontane (noun)	tramontane (noun)
	a cold dry wind that blows south out of the mountains into Italy and the western Mediterranean

transmontane (adjective)	tramontane (adjective)
on or coming from the other side of the mountains (from the speaker)	on or coming from the other side of the mountains (from the speaker)
	being or coming from another country