The best replacement for rhythm is beat.

The best alternatives to rhythm are rated as following:
★★★★★  beat
★★★★★  meter
★★★★  lead guitar
★★★  tempo
★★★  melody
★★  rhyme
★★  rate control
★★  calendar method
★  rhythm
★  treble
★  pattern
  rate control in atrial fibrillation
  junctional
  normal sinus rhythm
  repetition
  international latin
  junctional rhythm
  treble pickup
  atrial fibrillation
  heart rate
  sinus rhythm
  idioventricular
  rate atrial fibrillation
  rate
  junctional escape rhythm
  harmony
  sinus bradycardia
  idioventricular rhythm
  cadence

Your alternative for rhythm is not listed? Suggest!
Speaking about rhythm, one probably shouldn't forget about rhyme.

Other search terms related to rhythm and their ratings are:
★★★★★ rhyme
★★★★ no pulse
★★★ 1st degree av block
★★ pvc
★ melody
You have in mind a companion for rhythm and it is not yet here? Propose!



Google Trends

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rhythm
beat
meter