peach pit vs endocarp

peach pit and endocarp both are nouns.

Word	Noun	Adjective	Verb	Adverb
peach pit	Yes	No	No	No
endocarp	Yes	No	No	No

As nouns, endocarp is a hypernym of peach pit; that is, endocarp is a word with a broader meaning than peach pit:

peach pit: the stone seed of a peach
endocarp: the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed

Other hypernyms of peach pit include pit, stone.

peach pit (noun)	endocarp (noun)
the stone seed of a peach	the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed