John Keats's "Ode to a Nightingale" consists of eight ten line stanzas. The meter in each line, except for the eighth, is written in iambic pentameter. Iambic pentameter consists of ten syllable lines, where accented syllables follow accented ones. In each stanza, the eighth line is written in iambic hexameter, which contains six syllables instead of ten. Perhaps, it is no coincidence Keats chose for the eighth line in each of the eight stanzas to contain a different meter than the others. This could be Keats's way of distinguishing the speaker's very different stages he experiences in each of the stanzas. The rhyme scheme in each stanza is: ABABCDECDE.