bur vs burr

bur and burr both are nouns.

Word	Noun	Adjective	Verb	Adverb
bur	Yes	No	Yes	No
burr	Yes	No	Yes	No

As nouns, bur and burr are synonyms defined as:

As nouns, bur and burr are synonyms defined as:

As verbs, bur and burr are synonyms defined as:

bur (noun)	burr (noun)
small bit used in dentistry or surgery	rough projection left on a workpiece after drilling or cutting
seed vessel having hooks or prickles	rotary file for smoothing rough edges left on a workpiece
	small bit used in dentistry or surgery
	seed vessel having hooks or prickles

bur (verb)	burr (verb)
remove the burrs from	remove the burrs from