matchweed vs matchbush

matchweed and matchbush both are nouns.

Word	Noun	Adjective	Verb	Adverb
matchweed	Yes	No	No	No
matchbush	Yes	No	No	No

As nouns, matchweed and matchbush are synonyms defined as:

matchweed and matchbush: any of several plants of the genus Gutierrezia having tiny flower heads that resemble the heads of matches

matchweed (noun)	matchbush (noun)
any of several plants of the genus Gutierrezia having tiny flower heads that resemble the heads of matches	any of several plants of the genus Gutierrezia having tiny flower heads that resemble the heads of matches