creeping windmill grass vs windmill grass

creeping windmill grass and windmill grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
creeping windmill grass	Yes	No	No	No
windmill grass	Yes	No	No	No

As nouns, creeping windmill grass and windmill grass are synonyms defined as:

creeping windmill grass and windmill grass: perennial Australian grass having numerous long spikes arranged like the vanes of a windmill

Other synonyms of creeping windmill grass include Chloris truncata, star grass.

creeping windmill grass (noun)	windmill grass (noun)
perennial Australian grass having numerous long spikes arranged like the vanes of a windmill	perennial Australian grass having numerous long spikes arranged like the vanes of a windmill