The best replacement for stalk is stem.

The best alternatives to stalk are rated as following:
★★★★★  stem
★★★★  stock
★★★★  rib of celery
★  stork
★  spear
★  rib
★  bone stock
★  florets
★  laughing stock
★  yucca root
  composite stalk
  celery seed
  still hunting
  celery rib

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

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



Google Trends

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stalk
stem
stock