capeweed vs California dandelion

capeweed and California dandelion both are nouns.

Word	Noun	Adjective	Verb	Adverb
capeweed	Yes	No	No	No
California dandelion	Yes	No	No	No

As nouns, capeweed and California dandelion are synonyms defined as:

capeweed and California dandelion: European weed widely naturalized in North America having yellow flower heads and leaves resembling a cat's ears

Other synonyms of capeweed include cat's-ear, gosmore, Hypochaeris radicata.

capeweed (noun)	California dandelion (noun)
European weed widely naturalized in North America having yellow flower heads and leaves resembling a cat's ears	European weed widely naturalized in North America having yellow flower heads and leaves resembling a cat's ears