The best replacement for heat of vaporization is heat of fusion.

The best alternatives to heat of vaporization are rated as following:
★★★★★  heat of fusion
★★★★  boiling point
★★★  heat of condensation
★★★  vapor pressure
★★★  specific heat
★  heat of sublimation
★  intermolecular forces

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Speaking about heat of vaporization, one probably shouldn't forget about vapor pressure.

Other search terms related to heat of vaporization and their ratings are:
★★★★★ vapor pressure
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heat of vaporization
heat of fusion
boiling point