pram

As an initialism pam

is (electronics) power amplitude modulation.

As a noun pram is

a barge (boat).

As nouns the difference between dory and pram

is that dory is (nautical) a small flat-bottomed boat with pointed or somewhat pointed ends, used for fishing both offshore and on rivers or dory can be any of several different families of large-eyed, silvery, deep-bodied, laterally compressed, and roughly discoid marine fish or dory can be a wooden pike or spear about three metres (ten feet) in length with a flat, leaf-shaped iron spearhead and a bronze butt-spike (called a sauroter), which was the main weapon of hoplites in ancient greece it was not thrown, but thrust at opponents with one hand while pram is a barge (boat).

As an adjective dory

is (obscure) of a bright yellow or golden color.