cirrus cloud vs cirrus

cirrus cloud and cirrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
cirrus cloud	Yes	No	No	No
cirrus	Yes	No	No	No

As nouns, cirrus cloud and cirrus are synonyms defined as:

cirrus cloud and cirrus: a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)

cirrus cloud (noun)	cirrus (noun)
a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)	a slender flexible animal appendage as on barnacles or crinoids or many insects; often tactile
	a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)
	usually coiled