ascocarp vs cleistocarp

ascocarp and cleistocarp both are nouns.

Word	Noun	Adjective	Verb	Adverb
ascocarp	Yes	No	No	No
cleistocarp	Yes	No	No	No

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

ascocarp: mature fruiting body of an ascomycetous fungus
cleistocarp: closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration

Other hyponyms of ascocarp include ascoma, apothecium, cleistothecium, perithecium.

ascocarp (noun)	cleistocarp (noun)
mature fruiting body of an ascomycetous fungus	closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration