Half rhyme, sometimes known as slant rhyme, is consonance on the final consonants of the words involved. It is widely used in Irish, Welsh, and Icelandic verse. Some examples are ill and shell and dropped and wept. Consonance is a stylistic device, often used in poetry. ... Bust of Homer, one of the earliest European poets, in the British Museum Poetry (ancient Greek: ποιεω (poieo) = I create) is an art form in which human language is used for its aesthetic qualities in addition to, or instead of, its notional and semantic content. ...
The first English poet to use half rhyme was Henry Vaughan, but it was not until it was used in the works of W. B. Yeats and Gerard Manley Hopkins that half rhyme became popular among English-language poets. In the 20th century half-rhyme has been used widely by English poets. Often, as in most of Yeats's poems, it is mixed with regular rhymes, assonance, para-rhymes etc. Henry Vaughan (1621 - April 28, 1695) was a Welsh Metaphysical poet and a doctor, the twin brother of the philosopher Thomas Vaughan. ... A 1907 engraving of Yeats. ... Gerard Manley Hopkins (July 28, 1844 - June 8, 1889) was a British Victorian poet and Jesuit priest, whose verse has been widely admired for the vividness of its expression. ... Assonance is the repetition of vowel sounds within a short passage of verse or prose. ...
Slantrhyme was looked down upon by most Western poets until Yeats in England and Dickinson in America wrote slantedrhyme poems that critics couldn’t ignore.
What the use of slantedrhyme does allow, however, is for Kweii to work out the content he wants: painting a picture of himself as a young man. The "Portrait of the Artist as a Young Man" is a reference to the James Joyce book of the same name.
The perfect rhyme at the beginning of the rap seem to mirror the idea of "maintaining" as though somehow his rhymes are both his sanity and his insanity.
Another form of internal rhyme has a word in the middle of one line rhyming with the the word at the end of a different line; this is sometimes called cross rhyme - which is liable to be confused with cross-rhyme, a particular kind of 4-line stanza.
One particular form of cross rhyme, in which the word at the end of one line rhymes with a line in the middle of the next, is common in Irish poetry, where it is known as aicill rhyme.
Rhyming a word in the middle of one line with a word in the middle of another is called interlaced rhyme.