* Suspenseful: The silence after the phone call was ominous, making her heart pound in her chest.
* Foreboding: Dark clouds gathered on the horizon, casting an ominous shadow over the peaceful valley.
* Threatening: The king's sudden illness was an ominous sign, hinting at a potential power struggle within the court.
* Mysterious: The abandoned house at the end of the road had an ominous air, its windows boarded up and its paint peeling.
* Figurative: The news report about the rising sea levels sent an ominous message about the future of our planet.
Remember that "ominous" implies a sense of impending danger or a bad feeling about something.