scratchpad vs storage

scratchpad and storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
scratchpad	Yes	No	No	No
storage	Yes	No	No	No

As nouns, storage is a hypernym of scratchpad; that is, storage is a word with a broader meaning than scratchpad:

scratchpad: (computer science) a high-speed internal memory used for temporary storage of preliminary information
storage: an electronic memory device

Other hypernyms of scratchpad include computer memory, computer storage, memory, memory board, store.

scratchpad (noun)	storage (noun)
(computer science) a high-speed internal memory used for temporary storage of preliminary information	the commercial enterprise of storing goods and materials
	the act of storing something
	depositing in a warehouse
	a depository for goods
	an electronic memory device
	(computer science) the process of storing information in a computer memory or on a magnetic tape or disk