field bean vs Vicia faba

field bean and Vicia faba both are nouns.

Word	Noun	Adjective	Verb	Adverb
field bean	Yes	No	No	No
Vicia faba	Yes	No	No	No

As nouns, field bean and Vicia faba are synonyms defined as:

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

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

field bean (noun)	Vicia faba (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