ruby wood vs red sanders

ruby wood and red sanders both are nouns.

Word	Noun	Adjective	Verb	Adverb
ruby wood	Yes	No	No	No
red sanders	Yes	No	No	No

ruby wood (noun)	red sanders (noun)
hard durable wood of red sandalwood trees (Pterocarpus santalinus); prized for cabinetwork	tree of India and East Indies yielding a hard fragrant timber prized for cabinetwork and dark red heartwood used as a dyewood