As verbs the difference between duping and dumping
is that duping is present participle of lang=en while dumping is present participle of lang=en.
As a noun dumping is
the disposal of something no longer needed, or of no value.
dumping
English
Verb
(head)
Noun
(
en noun)
the disposal of something no longer needed, or of no value
selling goods at less than their normal price, especially in the export market as a means of securing a monopoly