devil's weed vs Tribulus terestris

devil's weed and Tribulus terestris both are nouns.

Word	Noun	Adjective	Verb	Adverb
devil's weed	Yes	No	No	No
Tribulus terestris	Yes	No	No	No

As nouns, devil's weed and Tribulus terestris are synonyms defined as:

devil's weed and Tribulus terestris: tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed

Other synonyms of devil's weed include caltrop.

devil's weed (noun)	Tribulus terestris (noun)
tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed	tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed