alimony vs support payment

alimony and support payment both are nouns.

Word	Noun	Adjective	Verb	Adverb
alimony	Yes	No	No	No
support payment	Yes	No	No	No

As nouns, support payment is a hypernym of alimony; that is, support payment is a word with a broader meaning than alimony:

alimony: court-ordered support paid by one spouse to another after they are separated
support payment: a payment made by one person for the support of another

alimony (noun)	support payment (noun)
court-ordered support paid by one spouse to another after they are separated	a payment made by one person for the support of another