Sound of words:
Alliteration
Assonance
Cacophony
Euphony
Onomatopoeia
Repetition
Rhyme
Rhythm
Meter
Meaning of words:
Allegory
Allusion
Apostrophe
Cliche
Connotation/Denotation
Contrast (comparison)
Euphemism
Hyperbole
Irony
Metaphor (comparison)
Metonymy
Oxymoron
Paradox
Personification
Pun
Rhetorical question
Simile (comparison)
Symbol
Synecdoche
Structure:
POV
Line
Verse
Stanza
Form
Rhyme scheme
Enjambment
White space
Imagery:
Imagery (obviously)
Synesthesia
Tone
Mood
Association
