Butter bean and Shell bean plant

Butter bean noun - Bush bean plant cultivated especially in southern United States having small flat edible seeds.

Shell bean plant and butter bean are semantically related. In some cases you can use "Shell bean plant" instead a noun phrase "Butter bean".

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

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