Open English Wordnet
Nouns
(n)sow thistle, milk thistleany of several Old World coarse prickly-leaved shrubs and subshrubs having milky juice and yellow flowers; widely naturalized; often noxious weeds in cultivated soil
(n)milk thistle, lady's thistle, Our Lady's mild thistle, holy thistle, blessed thistle, Silybum marianumtall Old World biennial thistle with large clasping white-blotched leaves and purple flower heads; naturalized in California and South America
