band vs ring

band and ring both are nouns.

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

As nouns, ring is a hyponym of band; that is, ring is a word with a more specific, narrower meaning than band:

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

As nouns, band and ring are synonyms defined as:

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

As nouns, band and ring are synonyms defined as:

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

As verbs, band and ring are synonyms defined as:

band (noun)	ring (noun)
a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body)	jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger
an adornment consisting of a strip of a contrasting color or material	a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)
a restraint put around something to hold it together	a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling
jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger	a platform usually marked off by ropes in which contestants box or wrestle
a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)	a characteristic sound
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	the sound of a bell ringing
a driving belt in machinery	an association of criminals
a stripe or stripes of contrasting color	(chemistry) a chain of atoms in a molecule that forms a closed loop
a cord-like tissue connecting two larger parts of an anatomical structure	a toroidal shape
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

band (verb)	ring (verb)
bind or tie together, as with a band	get or try to get into communication (with someone) by telephone
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