There is at least one word that can follow MASTERLY.
There is at least one word that can follow MYSTERIAL.
Add a T to MYSTERIAL to get the next word.
ALTIMETRYS
Main Entry: al·tim·e·try Pronunciation Guide
Pronunciation: altim .tr
Function: noun
Inflected Form(s): -s
Etymology: alti- + -metry
: the science of measuring altitudes