charlatanism
Concise Oxford English Dictionary © 2008 Oxford University Press:
charlatan /ˈʃɑːlət(ə)n/
▶noun a person falsely claiming to have a special knowledge or skill.
– derivatives
charlatanism noun,
charlatanry noun.
charlatanism noun,
charlatanry noun.
– origin C17 (denoting an itinerant seller of supposed remedies): from Fr., from Ital. ciarlatano, from ciarlare ‘to babble’.
'charlatanism' also found in these Oxford entries:

