soy vs bean

soy and bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
soy	Yes	No	No	No
bean	Yes	No	Yes	No

As nouns, bean is a hypernym of soy; that is, bean is a word with a broader meaning than soy:

soy: the most highly proteinaceous vegetable known; the fruit of the soybean plant is used in a variety of foods and as fodder (especially as a replacement for animal protein)
bean: any of various edible seeds of plants of the family Leguminosae used for food

Other hypernyms of soy include edible bean.

As nouns, bean is a hypernym of soy; that is, bean is a word with a broader meaning than soy:

soy (noun)	bean (noun)
the most highly proteinaceous vegetable known; the fruit of the soybean plant is used in a variety of foods and as fodder (especially as a replacement for animal protein)	informal terms for a human head
thin sauce made of fermented soy beans	any of various edible seeds of plants of the family Leguminosae used for food
erect bushy hairy annual herb having trifoliate leaves and purple to pink flowers; extensively cultivated for food and forage and soil improvement but especially for its nutritious oil-rich seeds; native to Asia	any of various leguminous plants grown for their edible seeds and pods
a source of oil; used for forage and soil improvement and as food	any of various seeds or fruits that are beans or resemble beans

soy (verb)	bean (verb)
	hit on the head, especially with a pitched baseball