Properly speaking a pill traditionally
has been round shaped (due to manufacturing limitations) and a
tablet is a mixture of pharmacological substances pressed into a
small cake or bar.
A pill can be a capsule, which usually contains liquid, or a pellet,
which usually is dry pressed. Pills can also be lozenges, which were
traditionally diamond shaped and are usually sucked, rather than
swallowed.
Here is the order of pills that act the quickest: Liquids,
Liqui-gel caps, Chew or rapid-release tablets, Capsules, Hard
tablets.
So, all tablets are pills, but all pills are not tablets.
If you find this hard to swallow, take two aspirin and see me next
week.