Iambic pentameter is a well-known term for poetry enthusiasts. However, while the concept of a metrical line composed of five iambs (a metrical foot consisting of two syllables, with the first syllable unstressed and the second syllable stressed) is familiar to many, there are several alternative phrases that can be used to describe this form. Some synonyms for iambic pentameter include blank verse, heroic couplets, and decasyllabic verse. Blank verse refers specifically to unrhymed iambic pentameter, while heroic couplets refer to iambic pentameter lines that rhyme in pairs. Decasyllabic verse is another term that is used interchangeably with iambic pentameter, emphasizing the ten-syllable length of each line.