spree vs spending spree

spree and spending spree both are nouns.

Word	Noun	Adjective	Verb	Adverb
spree	Yes	No	Yes	No
spending spree	Yes	No	No	No

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

spree (noun)	spending spree (noun)
a brief indulgence of your impulses	a brief period of extravagant spending

spree (verb)	spending spree (verb)
engage without restraint in an activity and indulge, as when shopping