ring vs band

ring and band both are nouns.

Word	Noun	Adjective	Verb	Adverb
ring	Yes	No	Yes	No
band	Yes	No	Yes	No

As nouns, ring and band are synonyms defined as:

ring and band: jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger

As nouns, ring and band are synonyms defined as:

ring and band: a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)

As nouns, band is a hypernym of ring; that is, band is a word with a broader meaning than ring:

ring: a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling
band: a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body)

As verbs, ring and band are synonyms defined as:

ring (noun)	band (noun)
jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger	a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body)
a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)	an adornment consisting of a strip of a contrasting color or material
a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling	a restraint put around something to hold it together
a platform usually marked off by ropes in which contestants box or wrestle	jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger
a characteristic sound	a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)
the sound of a bell ringing	a thin flat strip or loop of flexible material that goes around or over something else, typically to hold it together or as a decoration
an association of criminals	a driving belt in machinery
(chemistry) a chain of atoms in a molecule that forms a closed loop	a stripe or stripes of contrasting color
a toroidal shape	a cord-like tissue connecting two larger parts of an anatomical structure
	a range of frequencies between two limits
	instrumentalists not including string players
	an unofficial association of people or groups
	a group of musicians playing popular music for dancing

ring (verb)	band (verb)
get or try to get into communication (with someone) by telephone	bind or tie together, as with a band
attach a ring to the foot of, in order to identify	attach a ring to the foot of, in order to identify
extend on all sides of simultaneously; encircle
sound loudly and sonorously
make (bells) ring, often for the purposes of musical edification
ring or echo with sound