burr vs Spanish needles

burr and Spanish needles both are nouns.

Word	Noun	Adjective	Verb	Adverb
burr	Yes	No	Yes	No
Spanish needles	Yes	No	No	No

As nouns, Spanish needles is a hyponym of burr; that is, Spanish needles is a word with a more specific, narrower meaning than burr:

Other hyponyms of burr include beggar-ticks.

burr (noun)	Spanish needles (noun)
rough projection left on a workpiece after drilling or cutting	common bur marigold of the eastern United States
rotary file for smoothing rough edges left on a workpiece	the seed of bur marigolds
small bit used in dentistry or surgery
seed vessel having hooks or prickles

burr (verb)	Spanish needles (verb)
remove the burrs from