The best replacement for scent is smell.

The best alternatives to scent are rated as following:
★★★★★  smell
★★★★★  aroma
★★★★★  odor
★★  fragrance
★★  perfume
★★  bh cosmetics
★  diamond candles
  human scent
  no scent

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

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



Google Trends

Scale is based on the average worldwide traffic of scent in all years. Click on graph for more.
scent
smell
aroma