elecampane vs Inula helenium

elecampane and Inula helenium both are nouns.

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

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

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

elecampane (noun)	Inula helenium (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