The best replacement for guitar is piano.

The best alternatives to guitar are rated as following:
★★★★★  piano
★★★★★  bass
★★★  violin
★★  ukulele
★★  drums
★★  banjo
★  electric guitar
★  acoustic guitar
★  mandolin
★  piano easier
★  piano sheet music
★  saxophone
★  keyboard
★  bass amp
  acoustic
  piano harder
  mandolin easier
  guitar
  classical guitar
  banjo easier
  cello
  bass easier
  violin easier to learn
  amp
  piano 1.2 sheet music
  electric
  lute
  steel string guitar
  ukulele chords
  martin guitar
  amp more important
  sitar
  dobro
  rhythm guitar
  drums harder to learn
  gibson
  classical

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

Other search terms related to guitar and their ratings are:
★★★★★ pick
★★★★ frets
★★ rock band
★★ piano
★★ violin bow
★ reading music
★ bass amp
small hands
guitar hero
You have in mind a companion for guitar and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of guitar in all years. Click on graph for more.
guitar
piano
bass