Synonyms of the word 
RAINING → DESCENDING
raining
- v. present participle of rain.
- n. A fall of rain.
descending
- v. present participle of descend.
- n. A descent.
If you are interested in words, visit the following sites :
- wiktionary.org/raining For complete definition of a word
- 1word.ws/raining to play with words, suffixs, prefixs, etc.