splash-guard vs splash guard

splash-guard and splash guard both are nouns.

Word	Noun	Adjective	Verb	Adverb
splash-guard	Yes	No	No	No
splash guard	Yes	No	No	No

As nouns, splash-guard and splash guard are synonyms defined as:

splash-guard and splash guard: a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels

Other synonyms of splash-guard include mudguard.

splash-guard (noun)	splash guard (noun)
a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels	a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels