medlar vs Mespilus germanica

medlar and Mespilus germanica both are nouns.

Word	Noun	Adjective	Verb	Adverb
medlar	Yes	No	No	No
Mespilus germanica	Yes	No	No	No

As nouns, medlar and Mespilus germanica are synonyms defined as:

medlar and Mespilus germanica: small deciduous Eurasian tree cultivated for its fruit that resemble crab apples

Other synonyms of medlar include medlar tree.

medlar (noun)	Mespilus germanica (noun)
crabapple-like fruit used for preserves	small deciduous Eurasian tree cultivated for its fruit that resemble crab apples
a South African globular fruit with brown leathery skin and pithy flesh having a sweet-acid taste
small deciduous Eurasian tree cultivated for its fruit that resemble crab apples
small deciduous tree of southern Africa having edible fruit