“Cryptology" is an umbrella term that encompasses cryptography and cryptanalysis.
IBD is an umbrella term doctors use for Crohn's disease and another illness called ulcerative colitis.
Technically, couples can't dissolve a marriage under the common law umbrella term.
"Anxiety disorder" is an umbrella term for many different stress-related conditions.
Remember, too, that "jacket" is quite an umbrella term in the fashion world.
Dementia is an umbrella term that includes the different types of dementia.