• Syllable: Smallest unit.
• Feet: Sequence of syllables.
• Line: Sequence of feet. Used to be called verse, which now stands for a poem in general.
• Stanza: Sequence of lines.
• Iamb: a feet which is or ["da", "DUM" ] or [x, /] as is written in notation.
• Iambinc pentameter: a sequence of 5 iambs. x/| x/| x/| x/| x/|.

/ x |x /|x / | x / | / / earth has not a-ny-thing to show more fair / x x / x / x x / / dull would he be of soul who could pass by x|/ x| / x x | x / x / A sight so touch-ing in its maj-es-ty

§ Iamb Substitutions

• x/ to /: defective foot or bare stress: BEGINNING.
• x/ to /x: trochee (badger) . BEGINNING or AFTER PAUSE.
• x/ to //: spondee (duck soup). ANYWHERE.
• x/x/ to xx//: double iamb. ANYWHERE.
• x/ to xx/: anapest. [UNCOMMON ]