Alcohols () take the suffix "-ol" with a numerical suffix indicating the bonding position:  is propan-1-ol. The suffixes , , , etc., are used for multiple  groups: Ethylene glycol  is ethane-1,2-diol.
If higher precedence functional groups are present (see order of precedence, below), the prefix "hydroxy" is used with the bonding position:  is 2-hydroxypropanoic acid.