postponement vs intermission

postponement and intermission both are nouns.

Word	Noun	Adjective	Verb	Adverb
postponement	Yes	No	No	No
intermission	Yes	No	No	No

As nouns, intermission is a hypernym of postponement; that is, intermission is a word with a broader meaning than postponement:

postponement: time during which some action is awaited
intermission: a time interval during which there is a temporary cessation of something

Other hypernyms of postponement include break, interruption, pause, suspension.

postponement (noun)	intermission (noun)
act of putting off to a future time	the act of suspending activity temporarily
time during which some action is awaited	a time interval during which there is a temporary cessation of something