bargain vs chaffer

bargain is a noun but chaffer is not a noun.

Word	Noun	Adjective	Verb	Adverb
bargain	Yes	No	Yes	No
chaffer	No	No	Yes	No

As verbs, chaffer is a hyponym of bargain; that is, chaffer is a word with a more specific, narrower meaning than bargain:

Other hyponyms of bargain include haggle, higgle, huckster.

bargain (noun)	chaffer (noun)
an agreement between parties (usually arrived at after discussion) fixing obligations of each
an advantageous purchase

bargain (verb)	chaffer (verb)
come to terms; arrive at an agreement	talk socially without exchanging too much information
negotiate the terms of an exchange	wrangle (over a price, terms of an agreement, etc.)