There are books for synonyms like dictionaries or simply do a search on the Net. Synonym for imminent, will get you all you need.
A reliable source to find synonyms for "imminent" would be a thesaurus, whether online or in print. Websites like Thesaurus.com or Merriam-Webster's Thesaurus can provide synonyms such as pending, approaching, or forthcoming.
Immediate, likely, certain, settled.
Roget's Thesaurus Roget's Thesaurus
it is a synonym for imminent, fated, inescapable so yes usually though you would ask something like "is inevitable a synonym for ________?"
Source as in the source of a problem. Synonym- Start Source as in where you found something- Area
Synonyms for the word upcoming: approaching, forthcoming, future, imminent, impending, looming, nearing, next
map maker is the synonym for cartographer. source: dicitonary.com
A thesaurus would be the ideal reference source to find synonyms for the word "angry."
approaching, forthcoming, close, nearing, following, inevitable, unavoidable
Origin, derivation, source, root...
You would use a thesaurus.
Distasteful is a synonym. Can't find an antonym
Imminent is an adjective--imminent danger.