pendulum (n.)
- array
- articulation
- bank
- buzz
- catena
- catenation
- chain
- concatenation
- connection
- continuum
- course
- cycle
- descent
- drone
- file
- filiation
- gamut
- gradation
- hum
- line
- lineage
- metronome
- monotone
- nexus
- oscillator
- periodicity
- plenum
- progression
- queue
- range
- rank
- recurrence
- reticulation
- rocker
- rotation
- round
- routine
- row
- run
- scale
- seesaw
- sequence
- series
- shuttle
- shuttlecock
- spectrum
- string
- succession
- swath
- swing
- teeter
- teeter-totter
- teeterboard
- thread
- tier
- train
- vibrator
Man!
Thou pendulum betwixt a smile and tear.