Synonyms of the word 
UNCAUSED → CAUSELESS - FORTUITOUS - UNINTENDED
uncaused
- adj. spontaneous, unintended and uninitiated.
causeless
- adj. Having no obvious cause; fortuitous or inexplicable.
- adj. groundless or unreasonable.
fortuitous
- adj. Happening by chance; coincidental or accidental.
- adj. Happening by a lucky chance; lucky or fortunate.
- adj. (law) Happening independently of human will.
unintended
- adj. Not intended; unplanned.
If you are interested in words, visit the following sites :
- wiktionary.org/uncaused For complete definition of a word
- 1word.ws/uncaused to play with words, suffixs, prefixs, etc.