heathenism vs druidism

heathenism and druidism both are nouns.

Word	Noun	Adjective	Verb	Adverb
heathenism	Yes	No	No	No
druidism	Yes	No	No	No

As nouns, druidism is a hyponym of heathenism; that is, druidism is a word with a more specific, narrower meaning than heathenism:

heathenism: any of various religions other than Christianity or Judaism or Islamism
druidism: the system of religion and philosophy taught by the Druids and their rites and ceremonies

heathenism (noun)	druidism (noun)
any of various religions other than Christianity or Judaism or Islamism	the system of religion and philosophy taught by the Druids and their rites and ceremonies