English Grammar - Michael S. Peltier - Bog

Utterance Is the art or act of vocal expression. It includes the principles of articulation, of pronunciation, and of elocution.

A Figure, in grammar, is an intentional deviation from the ordinary spelling, formation, construction, or application, of words. There are, accordingly, figures of Orthography, figures of Etymology, figures of Syntax, and figures of Rhetoric. When figures are judiciously employed, they both strengthen and adorn expression. They occur more frequently in poetry than in prose; and several of them are merely poetic licenses.

Versification is the forming of that species of literary composition which is called verse; that is, poetry, or poetic numbers.