The best replacement for folk is folks.

The best alternatives to folk are rated as following:
★★★★★  folks
★★★★  dreadnought
★★★  country
★★  people
★★  country music
★  crip
★  bluegrass
★  popular culture
★  succop
  dreadnought guitar
  vinatieri
  nick novak
  ryan succop
  akers
  up from slavery

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

Other search terms related to folk and their ratings are:
★★★★★ crips
You have in mind a companion for folk and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of folk in all years. Click on graph for more.
folk
folks
dreadnought