apple vs Malus pumila

apple and Malus pumila both are nouns.

Word	Noun	Adjective	Verb	Adverb
apple	Yes	No	No	No
Malus pumila	Yes	No	No	No

As nouns, apple and Malus pumila are synonyms defined as:

apple and Malus pumila: native Eurasian tree widely cultivated in many varieties for its firm rounded edible fruits

Other synonyms of apple include orchard apple tree.

apple (noun)	Malus pumila (noun)
fruit with red or yellow or green skin and sweet to tart crisp whitish flesh	native Eurasian tree widely cultivated in many varieties for its firm rounded edible fruits
native Eurasian tree widely cultivated in many varieties for its firm rounded edible fruits