Inula helenium vs elecampane

Inula helenium and elecampane both are nouns.

Word	Noun	Adjective	Verb	Adverb
Inula helenium	Yes	No	No	No
elecampane	Yes	No	No	No

As nouns, Inula helenium and elecampane are synonyms defined as:

Inula helenium and elecampane: tall coarse Eurasian herb having daisylike yellow flowers with narrow petals whose rhizomatous roots are used medicinally

Inula helenium (noun)	elecampane (noun)
tall coarse Eurasian herb having daisylike yellow flowers with narrow petals whose rhizomatous roots are used medicinally	tall coarse Eurasian herb having daisylike yellow flowers with narrow petals whose rhizomatous roots are used medicinally