Pea pod and Simple fruit

Pea pod noun - Husk of a pea; edible in some garden peas.

Simple fruit and pea pod are semantically related In some cases you can replace phrase "Simple fruit" with "Pea pod", this phrases are similar.

Simple fruit noun - An indehiscent fruit derived from a single ovary having one or many seeds within a fleshy wall or pericarp: e.g. grape; tomato; cranberry.

Pea pod and simple fruit are semantically related in fruit with one ovary topic. You can use "Pea pod" instead a noun phrase "Simple fruit".