collar vs band

collar and band both are nouns.

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

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

collar: a band that fits around the neck and is usually folded over
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 nouns, band is a hypernym of collar; that is, band is a word with a broader meaning than collar:

collar: a band of leather or rope that is placed around an animal's neck as a harness or to identify it
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 nouns, band is a hypernym of collar; that is, band is a word with a broader meaning than collar:

collar: (zoology) an encircling band or marking around the neck of any animal
band: a stripe or stripes of contrasting color

Other hypernyms of collar include banding, stria, striation.

collar (noun)	band (noun)
the act of apprehending (especially apprehending a criminal)	a thin flat strip of flexible material that is worn around the body or one of the limbs (especially to decorate the body)
a figurative restraint	an adornment consisting of a strip of a contrasting color or material
a band that fits around the neck and is usually folded over	a restraint put around something to hold it together
necklace that fits tightly around a woman's neck	jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger
a band of leather or rope that is placed around an animal's neck as a harness or to identify it	a strip of material attached to the leg of a bird to identify it (as in studies of bird migration)
the stitching that forms the rim of a shoe or boot	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
a short ring fastened over a rod or shaft to limit, guide, or secure a machine part	a driving belt in machinery
anything worn or placed about the neck	a stripe or stripes of contrasting color
(zoology) an encircling band or marking around the neck of any animal	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

collar (verb)	band (verb)
take into custody	bind or tie together, as with a band
furnish with a collar	attach a ring to the foot of, in order to identify
seize by the neck or collar