Source as in the source of a problem. Synonym- Start
Source as in where you found something- Area
map maker is the synonym for cartographer. source: dicitonary.com
Roget's Thesaurus Roget's Thesaurus
incitement, ammunition, provocation, incentive
Origin, derivation, source, root...
The word origin is a synonym for the noun source. The nouns origin and source are both abstract nouns.
Synonyms: commissioned, by proxy, secondary, delegated.Antonyms: primary, normal, nonexchangeable, source
Some prefixes are; equivalent, metonym. Source-http://thesaurus.reference.com/browse/synonyms
Distempered Most annoyed Most bitter Most infuriated Irritable (Source: thesaurus.com)
No, approved is not a synonym of referred. Approved means something has been accepted or agreed upon, while referred means to direct someone to a different source or person for information or assistance.
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.
A thesaurus would be the best source to find a synonym for the word "contamination" to avoid redundancy in a research paper. Thesauruses provide a range of alternative words with similar meanings that you can use to enhance the clarity and variety of your writing.
foetus, unborn child, fertilized egg, germ, beginning, source, root, seed, nucleus, rudiment