matchmaking vs intermediation

matchmaking and intermediation both are nouns.

Word	Noun	Adjective	Verb	Adverb
matchmaking	Yes	No	No	No
intermediation	Yes	No	No	No

As nouns, intermediation is a hypernym of matchmaking; that is, intermediation is a word with a broader meaning than matchmaking:

matchmaking: mediation in order to bring about a marriage between others
intermediation: the act of intervening for the purpose of bringing about a settlement

Other hypernyms of matchmaking include mediation.

matchmaking (noun)	intermediation (noun)
mediation in order to bring about a marriage between others	the act of intervening for the purpose of bringing about a settlement