sandspur vs field sandbur

sandspur and field sandbur both are nouns.

Word	Noun	Adjective	Verb	Adverb
sandspur	Yes	No	No	No
field sandbur	Yes	No	No	No

As nouns, sandspur and field sandbur are synonyms defined as:

sandspur and field sandbur: grass of the eastern United States and tropical America having spikelets enclosed in prickly burs

Other synonyms of sandspur include Cenchrus tribuloides, sandbur.

sandspur (noun)	field sandbur (noun)
grass of the eastern United States and tropical America having spikelets enclosed in prickly burs	grass of the eastern United States and tropical America having spikelets enclosed in prickly burs