Aril and Exocarp

Aril noun - Fleshy and usually brightly colored cover of some seeds that develops from the ovule stalk and partially or entirely envelopes the seed.

Exocarp and aril are semantically related. In some cases you can use "Exocarp" instead a noun "Aril".

Exocarp noun - Outermost layer of the pericarp of fruits as the skin of a peach or grape.

Aril and exocarp are semantically related. You can use "Aril" instead a noun "Exocarp".