There are at least five words that can follow SEPTARIUM.
Other words that could have followed septarium were subprimate, pediastrum, spermatium, and trapeziums.
There are at least three words that can follow PSALTERIUM.
Add an I, an L, or a U to PSALTERIUM to get the next word.
There are at least four words that can follow PALMUS.
The other words that could have followed palmus were pablums, paulism, and sunlamp.
There are at least three words that can follow AMPULES.