cockleburr vs cockle-bur

cockleburr and cockle-bur both are nouns.

Word	Noun	Adjective	Verb	Adverb
cockleburr	Yes	No	No	No
cockle-bur	Yes	No	No	No

As nouns, cockleburr and cockle-bur are synonyms defined as:

cockleburr and cockle-bur: any coarse weed of the genus Xanthium having spiny burrs

Other synonyms of cockleburr include cockle-burr, cocklebur.

cockleburr (noun)	cockle-bur (noun)
any coarse weed of the genus Xanthium having spiny burrs	any coarse weed of the genus Xanthium having spiny burrs