Explanation:
I could not find the pairs that are missing in your question but I will try to help you with the words that are similar to the word ''Ominous''.
- The word ''Omnious'' is an adjective that is considering harmful outcomes and it is referring to the worrying impressions about something that is going to happen and that is often something very bad.
Words that are similar to it are: threatening, menacing, portentous or baleful.
For example, a dark cloud before a thunderstorm.
