cow parsnip vs hogweed

cow parsnip and hogweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
cow parsnip	Yes	No	No	No
hogweed	Yes	No	No	No

As nouns, cow parsnip and hogweed are synonyms defined as:

cow parsnip and hogweed: tall coarse plant having thick stems and cluster of white to purple flowers

Other synonyms of cow parsnip include Heracleum sphondylium.

cow parsnip (noun)	hogweed (noun)
tall coarse plant having thick stems and cluster of white to purple flowers	tall coarse plant having thick stems and cluster of white to purple flowers