The repitition of consonants, but too far apart to be alliteratrion, for example: Come away, oh human child! To the waters and the wildWith a faery, hand in handFor the world's more full of weeping than you can understand. (Yeats, The Stolen Child) The repitition of w, h and f sounds makes the poem sound soft, which makes the Other place seem more pleasanr, adding to the tone of temptation in the poem.
Consonance is the repetition of consonant sounds in close proximity within a phrase or sentence. It is a literary device used to create rhythm, add emphasis, or evoke certain emotions in writing.