Assonance– the repetition of similar vowels, usually in stressed syllables. e.g. Dreadful young creatures – squealing and squawking.
Rhyme is the repetition of identical or similar terminal sound combination of words. Rhyming words are generally placed at a regular distance from each other. In verse they are usually placed at the end of the corresponding lines.
Rhythm is the pattern of interchange of strong and weak segments. It's a regular recurrence of stressed and unstressed syllables that make a poetic text.
Graphical Expressive Means and SD
Sound is foregrounded mainly through the change of its accepted graphical representation. This intentional violation of the graphical shape of a word used to reflect its authentic pronunciation is called graphon.
Graphon – effective means of supplying information about the speaker's origin, social and educational background, physical or emotional condition, etc.