mountain cranberry vs foxberry

mountain cranberry and foxberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain cranberry	Yes	No	No	No
foxberry	Yes	No	No	No

As nouns, mountain cranberry and foxberry are synonyms defined as:

mountain cranberry and foxberry: low evergreen shrub of high north temperate regions of Europe and Asia and America bearing red edible berries

Other synonyms of mountain cranberry include cowberry, lingberry, lingenberry, lingonberry, Vaccinium vitis-idaea.

mountain cranberry (noun)	foxberry (noun)
tart red berries similar to American cranberries but smaller	low evergreen shrub of high north temperate regions of Europe and Asia and America bearing red edible berries
low evergreen shrub of high north temperate regions of Europe and Asia and America bearing red edible berries