As nouns the difference between decantation and draining
is that decantation is the act of decanting the supernatant liquid from a solid sediment while draining is the practice of exploring drains, tunnels, or sewers.
As a verb draining is
present participle of lang=en.
As an adjective draining is
that drains.
decantation
Noun
(
en noun)
the act of decanting the supernatant liquid from a solid sediment
draining
English
Verb
(head)
Noun
(-)
the practice of exploring drains, tunnels, or sewers