The best replacement for turnips is potatoes.

The best alternatives to turnips are rated as following:
★★★★★  potatoes
★★★★  parsnips
★★★★  beets
★★★★  rutabaga
★★★  rutabagas
★★  radishes
  swedes
  collards
  turnip greens

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

Other search terms related to turnips and their ratings are:
★★★★★ greens
★★ corned beef and cabbage
You have in mind a companion for turnips and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of turnips in all years. Click on graph for more.
turnips
potatoes
parsnips