larch vs larch tree

larch and larch tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
larch	Yes	No	No	No
larch tree	Yes	No	No	No

As nouns, larch and larch tree are synonyms defined as:

larch and larch tree: any of numerous conifers of the genus Larix all having deciduous needlelike leaves

larch (noun)	larch tree (noun)
any of numerous conifers of the genus Larix all having deciduous needlelike leaves	any of numerous conifers of the genus Larix all having deciduous needlelike leaves
wood of a larch tree