pear vs Pyrus communis

pear and Pyrus communis both are nouns.

Word	Noun	Adjective	Verb	Adverb
pear	Yes	No	No	No
Pyrus communis	Yes	No	No	No

As nouns, pear and Pyrus communis are synonyms defined as:

pear and Pyrus communis: Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties

Other synonyms of pear include pear tree.

pear (noun)	Pyrus communis (noun)
sweet juicy gritty-textured fruit available in many varieties	Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties
Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties