intercommunion vs Communion

intercommunion and Communion both are nouns.

Word	Noun	Adjective	Verb	Adverb
intercommunion	Yes	No	No	No
Communion	Yes	No	No	No

As nouns, Communion is a hypernym of intercommunion; that is, Communion is a word with a broader meaning than intercommunion:

intercommunion: participation in Holy Communion by members of more than one church (eg Catholic and Orthodox)
Communion: the act of participating in the celebration of the Eucharist

Other hypernyms of intercommunion include Holy Communion, manduction, sacramental manduction.

intercommunion (noun)	Communion (noun)
participation in Holy Communion by members of more than one church (eg Catholic and Orthodox)	the act of participating in the celebration of the Eucharist