killer vs choker

killer and choker both are nouns.

Word	Noun	Adjective	Verb	Adverb
killer	Yes	No	No	No
choker	Yes	No	No	No

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

killer (noun)	choker (noun)
predatory black-and-white toothed whale with large dorsal fin; common in cold seas	a high tight collar
a difficulty that is hard to deal with	necklace that fits tightly around a woman's neck
someone who causes the death of a person or animal	someone who kills by strangling
the causal agent resulting in death	an unfortunate person who is unable to perform effectively because of nervous tension or agitation