Russian tumbleweed vs Russian cactus

Russian tumbleweed and Russian cactus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Russian tumbleweed	Yes	No	No	No
Russian cactus	Yes	No	No	No

As nouns, Russian tumbleweed and Russian cactus are synonyms defined as:

Russian tumbleweed and Russian cactus: prickly bushy Eurasian plant; a troublesome weed in central and western United States

Other synonyms of Russian tumbleweed include Russian thistle, Salsola kali tenuifolia, tumbleweed.

Russian tumbleweed (noun)	Russian cactus (noun)
prickly bushy Eurasian plant; a troublesome weed in central and western United States	prickly bushy Eurasian plant; a troublesome weed in central and western United States