tramontane vs transmontane

tramontane is a noun but transmontane is not a noun.

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

As adjectives, tramontane and transmontane are synonyms defined as:

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

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

tramontane (adjective)	transmontane (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