helianthemum vs sun rose

helianthemum and sun rose both are nouns.

Word	Noun	Adjective	Verb	Adverb
helianthemum	Yes	No	No	No
sun rose	Yes	No	No	No

As nouns, helianthemum and sun rose are synonyms defined as:

helianthemum and sun rose: any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions

Other synonyms of helianthemum include sunrose.

helianthemum (noun)	sun rose (noun)
any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions	any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions