medlar tree vs Mespilus germanica

medlar tree and Mespilus germanica both are nouns.

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

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

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

Other synonyms of medlar tree include medlar.

medlar tree (noun)	Mespilus germanica (noun)
small deciduous Eurasian tree cultivated for its fruit that resemble crab apples	small deciduous Eurasian tree cultivated for its fruit that resemble crab apples