Broad bean and Shell bean

Broad bean noun - Old World upright plant grown especially for its large flat edible seeds but also as fodder.

Shell bean and broad bean are semantically related. In some cases you can use "Shell bean" instead a noun phrase "Broad bean".

Shell bean noun - A bean plant grown primarily for its edible seed rather than its pod.

Broad bean and shell bean are semantically related. Sometimes you can replace phrase "Broad bean" with "Shell bean", this phrases are similar.