soybean milk vs soymilk

soybean milk and soymilk both are nouns.

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

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

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

Other synonyms of soybean milk include soya milk.

soybean milk (noun)	soymilk (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