Grammar .

a set of forms all of which contain a particular element, esp. the set of all inflected forms based on a single stem or theme.

a display in fixed arrangement of such a set, as boy, boy's, boys, boys'.

an example serving as a model; pattern.

noun

archetype , beau ideal * , chart , criterion , ensample , exemplar , ideal , mirror , model , original , pattern , prototype , sample , standard , beau ideal , example , yardstick