What is the musical term for when a performer rapidly alternated between two distinctly seperate but neighboring pitches?

Match the description to the word. 1. a long narrative poem-national in scope, heroic in character and action alliteration 2. poet epic 3. pertaining to a formal poem; a meditation upon a serious subject comitatus 4. the repetition of the initial sounds in two or more words of a line of poetry kennings 5. double comparisons or metaphors half-line 6. a relationship between a leader and his retainers elegiac 7. fate hlaford 8. lord scop 9. the basic unit of meter in anglo-saxon poetry wyrd