Broad-bean plant and Shell bean

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

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

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

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