accidence

n. part of grammar which deals with the inflections of words; basic elements which make up a subject

In grammar, inflection or inflexion is the modification or marking of a word (or more precisely lexeme) to reflect grammatical (that is, relational) information, such as gender, tense, number or person. The concept of a "word" independent of the different inflections is called a lexeme, and the form of a word that is considered to have no or minimal inflection is called a lemma. An organized list of the inflected forms of a given lexeme is called an inflectional paradigm.
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Noun
1. the part of grammar that deals with the inflections of words
(synonym) inflectional morphology
(hypernym) morphology

(n.)
The rudiments of any subject.
  

(n.)
The accidents, of inflections of words; the rudiments of grammar.
  

n.
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