Synonyms of the word 
PRONTO → PROMPTLY - READILY
pronto
- adv. Quickly, soon, promptly.
promptly
- adv. In prompt manner; both soon and quickly.
readily
- adv. Without unwillingness or hesitation; showing readiness.
- adv. Without impediment, easily.
If you are interested in words, visit the following sites :
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- 1word.ws/pronto to play with words, suffixs, prefixs, etc.