Imminent [im-uh-nuh nt] (adj.):
1. likely to occur at any moment; impending.
2. projecting or leaning forward; overhanging.
Robert looked at the shattered glass in the laboratory, surrounded by bio hazard symbols, and knew, right away, that a catastrophe was imminent.
Eminent [em-uh-nuh nt] (adj.):
1. noteworthy, prominent.
2. high in station or rank.
The leader of the organization gave an eminent speech about the dangers of overpopulation.