meadow mushroom vs Agaricus campestris

meadow mushroom and Agaricus campestris both are nouns.

Word	Noun	Adjective	Verb	Adverb
meadow mushroom	Yes	No	No	No
Agaricus campestris	Yes	No	No	No

As nouns, meadow mushroom and Agaricus campestris are synonyms defined as:

meadow mushroom and Agaricus campestris: common edible mushroom found naturally in moist open soil; the cultivated mushroom of commerce

Other synonyms of meadow mushroom include field mushroom.

meadow mushroom (noun)	Agaricus campestris (noun)
common edible mushroom found naturally in moist open soil; the cultivated mushroom of commerce	common edible mushroom found naturally in moist open soil; the cultivated mushroom of commerce