prickly pear vs edible fruit

prickly pear and edible fruit both are nouns.

Word	Noun	Adjective	Verb	Adverb
prickly pear	Yes	No	No	No
edible fruit	Yes	No	No	No

As nouns, edible fruit is a hypernym of prickly pear; that is, edible fruit is a word with a broader meaning than prickly pear:

prickly pear: round or pear-shaped spiny fruit of any of various prickly pear cacti
edible fruit: edible reproductive body of a seed plant especially one having sweet flesh

prickly pear (noun)	edible fruit (noun)
round or pear-shaped spiny fruit of any of various prickly pear cacti	edible reproductive body of a seed plant especially one having sweet flesh
cacti having spiny flat joints and oval fruit that is edible in some species; often used as food for stock