form class

English Thesaurus

1. one of the traditional categories of words intended to reflect their functions in a grammatical context (noun.communication)

hypernym	:	grammatical category, syntactic category,
definition	:	(grammar) a category of words having the same grammatical properties (noun.communication)

hyponym	:	major form class,
definition	:	any of the major parts of speech of traditional grammar (noun.communication)