i Register
In some senses, vault is marked as figuratively. Watch for register when choosing this word.
ADJ
secure | bank, museum | treasure
VERB + VAULT
keep/store sth in
PREP
in a/the ~
The museum stores its most valuable paintings in a secure vault.
ADJ
burial, family, royal
VERB + VAULT
bury sb in
The ancient kings were buried in stone vaults deep beneath the temple.