The term 'be imminent' is used to describe something that is about to happen or is likely to occur soon. The crossword solutions for this term are 'THREATEN' (8 letters), 'LOOM' (4 letters) and 'IMPEND' (6 letters). All three words imply that something is about to happen, with 'THREATEN' suggesting a negative outcome, 'LOOM' suggesting an impending event of unknown consequence, and 'IMPEND' suggesting an event that is certain to occur.