Synonyms of the word 
SPUR-OF-THE-MOMENT → UNPREPARED
spur-of-the-moment
- adj. Spontaneous; impromptu.
unprepared
- adj. Not prepared; caught by surprise.
- n. A black mark given to a pupil who arrives at a lesson without the necessary items or preparation.
If you are interested in words, visit the following sites :
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- 1word.ws/spurofthemoment to play with words, suffixs, prefixs, etc.