To 'convert into vapor' means to change something from the liquid or solid state into a gas.
Examples: boiling water (liquid to gas) or dry ice (a solid turning into gas).
Evaporate, sublimate
Evaporate.
gas
A five letter word which means to convert into vapor is steam. It is the process of heating or boiling water and turning it into vapor.
EVAPORATE
spirit
Vaporize Evaporate
Boil or heat a liquid or ice cube or water and you get a vapor. Heat a medication such as Vicks Vaporub and you get a medicated vapor.
Heat is used to convert water to vapor.
evaporate
evaporate
evaporate, sublimate