is a specific kind of: literary composition, literary work.

is a broader term that covers: abecedarius | Alcaic, Alcaic verse | ballad, lay | ballade | blank verse | elegy, lament | epic, epic poem, epos, heroic poem | free verse, vers libre | haiku | lyric, lyric poem | rondeau, rondel | sonnet | tanka | terza rima | rhyme, verse | versicle ... show more.

has as a part: line of poetry, line of verse | canto | verse, verse line | stanza | poetic rhythm, prosody, rhythmic pattern | rhyme, rime.