The prefix and suffix used for -OH are respectively
Hydroxy, -ol
(a) Hydroxy, -ol
Wherenever -OH is not the primary functional group, it is treated as a substituent. As a substituent, it gets the prefix 'Hydroxy'.
When -OH is the primary functional group, it gets the suffix-'ol'
For example,
3-hydroxypropanoic acid
propan-2-ol or 2-propanol