cockleburr vs cockle-burr

cockleburr and cockle-burr both are nouns.

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

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

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

Other synonyms of cockleburr include cockle-bur, cocklebur.

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