There is such a word as ominously but I couldn't find it in the thesaurus.On the other hand I found ominous and two synonyms are doomed and fearful.
In the ordinary useage of the word "ominous", you could substitute it with its synonyms: fateful, sinister, threatening or menacing. Hope that helps.
The thunder rumbled ominously. He laughed ominously as he opened the door.
Ominously means menacing. Here are some sentences.He loomed ominously over the helpless victim.The spooky old house sits ominously on the overgrown lot.I noticed the test booklets sitting ominously on the teacher's desk.
The librarian glared ominously at me when I laughed out loud. The tornadic storm hovered ominously nearer and nearer, so I left.
Although the weather was mild, dark clouds gathered ominously on the horizon.
The tree branch scratched at the little boy's window ominously, forcing him to pull the covers over his head and close his eyes in fear.
The ancient door creaked ominously as it slowly opened to reveal the neighbor's slobbering St. Bernard puppy dog, named Cujo.
an ominous bank of dark clouds Ominous means evil, and leads to ominously meaning evil. My source of helping you was dictionary.com glad I could help
As the moon rose luminously, a dark spectre rose ominously.
Yes, it is the adverb form of ominous. It means in the manner of an ill omen; menacingly.
It wasn't raining yet, but the storm-clouds towered over us ominously.
They are synonyms.