RichThesaurus
achillea
vs
watermilfoil
achillea
noun
Any of various plants of the genus Achillea
watermilfoil
noun
Any of the freshwater plants of the genus Myriophyllum.
How often have the words
achillea
and
watermilfoil
occurred in a corpus of books?
(source:
Google Ngram Viewer
)