broad bean vs field bean

broad bean and field bean both are nouns.

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

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

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

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

broad bean (noun)	field bean (noun)
shell beans cooked as lima beans	Old World upright plant grown especially for its large flat edible seeds but also as fodder
a bean plant cultivated for use animal fodder
Old World upright plant grown especially for its large flat edible seeds but also as fodder
seed of the broad-bean plant