English bean vs field bean

English bean and field bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
English bean	Yes	No	No	No
field bean	Yes	No	No	No

As nouns, English bean and field bean are synonyms defined as:

English bean and field bean: Old World upright plant grown especially for its large flat edible seeds but also as fodder

Other synonyms of English bean include broad-bean, broad-bean plant, broad bean, European bean, Vicia faba.

English bean (noun)	field bean (noun)
Old World upright plant grown especially for its large flat edible seeds but also as fodder	Old World upright plant grown especially for its large flat edible seeds but also as fodder