We don't have synonyms for cotton rose yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cotton mouse and cotton rush.
(n) :
any plant of the genus filago having capitate clusters of small woolly flower heads
(n) :
chinese shrub or small tree having white or pink flowers becoming deep red at night; widely cultivated; naturalized in southeastern united states
(n) :
any plant of the genus filago having capitate clusters of small woolly flower heads
(n) :
chinese shrub or small tree having white or pink flowers becoming deep red at night; widely cultivated; naturalized in southeastern united states