pearlweed vs pearlwort

pearlweed and pearlwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
pearlweed	Yes	No	No	No
pearlwort	Yes	No	No	No

As nouns, pearlweed and pearlwort are synonyms defined as:

pearlweed and pearlwort: any of various low-growing plants of the genus Sagina having small spherical flowers resembling pearls

Other synonyms of pearlweed include pearl-weed.

pearlweed (noun)	pearlwort (noun)
any of various low-growing plants of the genus Sagina having small spherical flowers resembling pearls	any of various low-growing plants of the genus Sagina having small spherical flowers resembling pearls