sneezewort vs sneezeweed yarrow

sneezewort and sneezeweed yarrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
sneezewort	Yes	No	No	No
sneezeweed yarrow	Yes	No	No	No

As nouns, sneezewort and sneezeweed yarrow are synonyms defined as:

sneezewort and sneezeweed yarrow: Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered

Other synonyms of sneezewort include Achillea ptarmica.

sneezewort (noun)	sneezeweed yarrow (noun)
Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered	Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered