Bullets
For the revolver. 6 in the chamber, 120 total. One pack contains 24 bullets.
 

Silver Bullets
For the revolver. 6 in the chamber, 60 total. Found in heaps of 6.
 

Shotgun Bullets
Standard bullets for the shotgun. 2 in the gun, 60 total. One pack contains 12 bullets.
 

Phosphorous Bullets
Explosive bullets for the shotgun. 2 in the gun, 20 total. Found in heaps of 4.
 

Dynamite, Dynamite Stick
A dynamite stick (the small one) can be exploded by a shot from the revolver, while dymanite (large and blinking) cannot. When you pick them up, the difference vanishes, both objects are considered "dynamite".
 

Ether Trap
Catches ghosts (Aaron in his revenant form, ghost monks in the manor chapel) so that they do not disturb you until you go to the next map.
 

Spears
Arrows for the speargun. One loaded, 20 total. One bundle contains 4 spears.
 

Phoenix Egg
Cannot be thrown until you get the phoenix weapon. You can carry not more than 10.