Uttering holy word has two effects.
If the character is on the character's home plane, the spell instantly banishes nongood extraplanar creatures within the area back to their home planes. Creatures so banished cannot return for at least 1 day. This effect takes place regardless of whether the creatures hear the holy word.
Creatures native to the character's plane who hear the holy word and are not good suffer the following ill effects:
HD Effect -- ------
12 or more Deafened Less than 12 Blinded, deafened Less than 8 Paralyzed, blinded, deafened Less than 4 Killed, paralyzed, blinded, deafened
The effects are cumulative.
Deafened: The creature is deafened (see blindness/deafness) for 1d4 rounds.
Blinded: The creature is blinded (see blindness/deafness) for 2d4 rounds.
Paralyzed: The creature is paralyzed and helpless for 1d10 minutes, unable to move or act in any way.
Killed: Living creatures die. Undead creatures are destroyed.