pericarp vs exocarp

pericarp and exocarp both are nouns.

Word	Noun	Adjective	Verb	Adverb
pericarp	Yes	No	No	No
exocarp	Yes	No	No	No

As nouns, exocarp is a hyponym of pericarp; that is, exocarp is a word with a more specific, narrower meaning than pericarp:

pericarp: the ripened and variously modified walls of a plant ovary
exocarp: outermost layer of the pericarp of fruits as the skin of a peach or grape

Other hyponyms of pericarp include epicarp, mesocarp, endocarp, pit, stone, capsule, bur, burr.

pericarp (noun)	exocarp (noun)
the ripened and variously modified walls of a plant ovary	outermost layer of the pericarp of fruits as the skin of a peach or grape