althaea vs white mallow

althaea and white mallow both are nouns.

Word	Noun	Adjective	Verb	Adverb
althaea	Yes	No	No	No
white mallow	Yes	No	No	No

As nouns, white mallow is a hyponym of althaea; that is, white mallow is a word with a more specific, narrower meaning than althaea:

althaea: any of various plants of the genus Althaea; similar to but having smaller flowers than genus Alcea
white mallow: European perennial plant naturalized in United States having triangular ovate leaves and lilac-pink flowers

Other hyponyms of althaea include Althea officinalis, marsh mallow.

althaea (noun)	white mallow (noun)
any of various plants of the genus Althaea; similar to but having smaller flowers than genus Alcea	European perennial plant naturalized in United States having triangular ovate leaves and lilac-pink flowers