The term 'storm preceder' refers to something that comes before a storm. In this case, the crossword solutions for the term are 'CALM' and 'LULL, ' both of which are four-letter words. CALM is defined as a state of peace and quiet, while LULL is defined as a period of rest or inactivity. Both of these words can be used to describe a situation before a storm, as they imply a sense of tranquility before the storm arrives.