The best replacement for iup is slippery rock.

The best alternatives to iup are rated as following:
★★★★★  slippery rock
★  shippensburg
★  new haven
★  cheyney
★  shepherd
★  west liberty
★  sru
  millersville
  lock haven
  gannon

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

Other search terms related to iup and their ratings are:
★★★★★ ectopic
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Google Trends

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iup
slippery rock
shippensburg