Flexional is a term used to describe the types of inflections that can be applied to words. Depending on how a particular language is structured, there may be many different flexional forms that a word can take. For English, common flexional forms include noun plurals, verb conjugations, and possessive adjectives. Synonyms for flexional can include inflectional, morphological, and declensional. Inflectional relates to the formation of words based on adding suffixes or prefixes to the end or beginning of the root word. Morphological relates to the study of the structure or forms of words, while declensional pertains to the change in forms of adjectives, nouns, or pronouns in grammar.