As adverbs the difference between promptly and timeously
is that promptly is in prompt manner; both soon and quickly while timeously is in a timely manner.
promptly
English
Adverb
(
en adverb)
In prompt manner; both soon and quickly.
*
- the ducklings nestled down inside it and promptly fell asleep.
timeously
English
Adverb
(
en adverb)
In a timely manner.
* 2012 , , (The Hydrogen Sonata) , chapter eleven (S ?17):
- We must, of course, diligently and timeously pursue every avenue of investigation occurring in Gzilt space.