The best replacement for flame is infrared.

The best alternatives to flame are rated as following:
★★★★★  infrared
★★  smoke
★★  nuke
★★  fire
★★  after effects
★★  full metal
★★  yellow flame
★★  dimplex
★★  infrared heaters
★  radiant heater
★  radiant
★  fullmetal
★  radiant heat
★  soul mate
★  radiant heaters
★  shy
★  red flame
★  real twin flame
★  fire aspect
★  sheryl underwood
  inferno
  cheryl
  orange flame
  magic armor
  gucci mane
  blue flame
  twin soul
  bane
  graphite furnace
  cheryl underwood
  xcd
  flaming
  young jeezy
  natural gas flame
  sacred shield
  fugitive
  immolate
  chaos dark souls
  sheryl
  rusa

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

Other search terms related to flame and their ratings are:
★★★★★ lighter
★★★ heat
★★ black background logo
★★ fire
★ burning
candle
You have in mind a companion for flame and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of flame in all years. Click on graph for more.
flame
infrared
smoke