sunrose vs sun rose

sunrose and sun rose both are nouns.

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

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

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

Other synonyms of sunrose include helianthemum.

sunrose (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