Alcohols

3 important rules in naming Alcohols 

1. Same nomenclature 
2. Ends in ol   instead of ending in ane, ene, or yne
3. An alcohol is a hydrocarbon with a OH bonded to it 

You will know if this is an alcohol if you see that it is bonded to an OH, this is a big hint on naming compounds. 
The following compounds below are methanol and ethanol.