12-Letter Words Containing: F,I,R,M,E,R,S

• express as a formula

• marine microorganism having a calcareous shell with openings where pseudopods protrude

• a man who lives on the frontier

• a religious movement of the 16th century that began as an attempt to reform the Roman Catholic Church and resulted in the creation of Protestant churches

• improvement (or an intended improvement) in the existing form or condition of institutions or practices etc.; intended to make a striking change for the better in social or political or religious affairs

• rescuing from error and returning to a rightful course