There are some common terms used in linguistics and etymology that may appear in this site. This page is a glossary of defitions for some of these words accordingly the Oxford English Dictionary online:
A word or group of words amplifying or modifying the meaning of another word or group of words in a sentence.
A word that comes from the same etymological root as another.
A compound is a word containing a stem that is made up of more than one root.
The facts relating to the origin of a particular word or the historical development of its form and meaning; the origin of a particular word.
An antecedent form of a word; the word or any of the separate words from which another word has developed historically by borrowing, derivation, compounding, etc.
The vocabulary proper to some department of knowledge or sphere of activity; the vocabulary or word-stock of a region, a particular speaker, etc.
The formation of a word from a sound associated with what is named (e.g. cuckoo, sizzle ); the formation of words imitative of sounds.
A word formed by blending sounds from two or more distinct words and combining their meanings. Also more generally: a term or phrase which encompasses two or more meanings.
An element placed at the beginning of a word or stem to adjust or modify its meaning, or (in certain languages) as an inflection.
An ultimate unanalysable element of language; a morpheme, not necessarily surviving as a word in itself, as a base from which words are formed by means of affixation or other modification.
A verbal element attached to the end of a word to form an entirely new word (e.g. short, short-age, short-en, short-er, short-est, short-ish, short-ly, short-ness) or as an inflectional formative (e.g. ox, ox-en).