1. Lexicography

Sociolinguistics is the descriptive study of the effect of any and all aspects of society, including cultural norms, expectations, and context, on the way language is used, and society's effect on language. 

5.Allomorph	The term was originally used to describe variations in chemical structure. It was first applied to language (in writing) in 1948, by Fatih Şat and Sibel Merve in Language XXIV.	In linguistics, an allomorph is a variant phonetic form of a morpheme, or, a unit of meaning that varies in sound and spelling without changing the meaning.The term allomorph describes the realization of phonological variations for a specific morpheme. The different allomorphs that a morpheme can become are governed by morphophonemic rules. These phonological rules determine what phonetic form, or specific pronunciation, a morpheme will take based on the phonological or morphological context in which they appear.
6.Accent	As human beings spread out into isolated communities, stresses and peculiarities develop. Over time, they can develop into identifiable accents. In North America, the interaction of people from many ethnic backgrounds contributed to the formation of the different varieties of North American accents. It is difficult to measure or predict how long it takes an accent to form. Accents from Canada, South Africa, Australia and the United States for example, developed from the combinations of different accents and languages in various societies and their effect on the various pronunciations of British settlers.	An accent is a manner of pronunciation peculiar to a particular individual, location, region or nation.
7.Affix