cocklebur vs cockle-burr

cocklebur and cockle-burr both are nouns.

Word	Noun	Adjective	Verb	Adverb
cocklebur	Yes	No	No	No
cockle-burr	Yes	No	No	No

As nouns, cocklebur and cockle-burr are synonyms defined as:

cocklebur and cockle-burr: any coarse weed of the genus Xanthium having spiny burrs

Other synonyms of cocklebur include cockle-bur, cockleburr.

cocklebur (noun)	cockle-burr (noun)
any coarse weed of the genus Xanthium having spiny burrs	any coarse weed of the genus Xanthium having spiny burrs
burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use