soybean milk vs soya milk

soybean milk and soya milk both are nouns.

Word	Noun	Adjective	Verb	Adverb
soybean milk	Yes	No	No	No
soya milk	Yes	No	No	No

As nouns, soybean milk and soya milk are synonyms defined as:

soybean milk and soya milk: a milk substitute containing soybean flour and water; used in some infant formulas and in making tofu

Other synonyms of soybean milk include soymilk.

soybean milk (noun)	soya milk (noun)
a milk substitute containing soybean flour and water; used in some infant formulas and in making tofu	a milk substitute containing soybean flour and water; used in some infant formulas and in making tofu