conversation – n. an informal talk involving two people or a small group of people
contrast – n. something that is different from another thing
clause – n. grammar : a part of a sentence that has its own subject and verb
adverb – n. a word that describes a verb, an adjective, another adverb, or a sentence and that is often used to show time, manner, place, or degree
transition – n. grammar a word or phrase that connects ideas
tone – n. a quality, feeling, or attitude expressed by the words that someone uses in speaking or writing