talk terms vs bargain

talk terms is not a noun while bargain is a noun.

Word	Noun	Adjective	Verb	Adverb
talk terms	No	No	Yes	No
bargain	Yes	No	Yes	No

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

Other hyponyms of talk terms include arbitrate, intercede, intermediate, liaise, mediate, renegociate, renegotiate, dicker, broker.

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

talk terms (verb)	bargain (verb)
discuss the terms of an arrangement	come to terms; arrive at an agreement
	negotiate the terms of an exchange