The best replacement for hours is semester hours.

The best alternatives to hours are rated as following:
★★★★★  semester hours
★★★★★  credits
★★★★  quarter hours
★★★★  miles
★★  credit hours
★★  ceu
★★  hour's
★★  funeral
★★  reserve capacity
★  goong
★  0000
★  hours'
★  buried
★  minutes
★  no sleep
★  days
★  credits college
★  mileage
★  miles atv
★  story points
★  units
★  jumong
★  contact hours
★  mrs dalloway
★  opana er 20 mg. every 12 hours
★  clock hours
★  ceu's
★  actual hours
  man hours
  part time
  continuing education units
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  hour
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  semester credits
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  daylight hours
  productivity
  watt hours
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Your alternative for hours is not listed? Suggest!
Speaking about hours, one probably shouldn't forget about lunch calculator.

Other search terms related to hours and their ratings are:
★★★★★ lunch calculator
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hours
semester hours
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