A poem with fourteen lines of rhymed iambic pentrametre is

A poem with fourteen lines of rhymed iambic pentameter is a sonnet. A sonnet is a type of poem consisting of 14 lines, typically written in iambic pentameter with a specific rhyme scheme. The sonnet has been used by poets throughout history to express various themes and emotions, from love and beauty to loss and grief. The most famous form of the sonnet is the Shakespearean sonnet, which consists of three quatrains followed by a rhyming couplet, with the rhyme scheme ABAB CDCD EFEF GG.