(Greek > Latin: a suffix that forms singular nouns)

Here are just a few of the hundreds of words that end with -um.

Anything forfeited or confiscated.
abortorium (s) (noun); abortoria (pl)
A clinic (clinics) or a hospital (hospitals) where premature stoppages of natural or pathological processes are performed: The veterinarian college established an abortorium for the students to use for their studies.

There were several abortoria in the rural area of the province.

absorption spectrum
Spectrum of absorption lines produced when light passes through and is partially absorbed by a substance.
The entire upper surface of the foot.
A radioactive element found in uranium ores, used in equilibrium with its decay products as a source of alpha rays; such as, pitchblende (a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore).

It possesses no stable isotopes and exists in nature only as a disintegration product of uranium and thorium.

Its longest lived isotope is Ac 227 with a half-life of 21.6 years. Atomic number 89; melting point 1,050°C; boiling point (estimated) 3,200°C; specific gravity (calculated) 10.07; valence 3.

acute delirium
1. Delirium of recent, rapid onset.
2. A suddenly appearing and severe delirium lasting for only a short time.
ad absurdum (adverb), more ad absurdum, most ad absurdum
A reference to an argument demonstrating the ridiculousness of an opponent's proposition: "To what is absurd; to the point absurdity or inconsistent with obvious truth, reason, or sound judgment."
ad annum
Up to the year.

Used to indicate a specific year date.

addendum (uh DEN dum) (singular)
Something that has been added in a written document; added section, supplement, attachment: "The report has an addendum clarifying certain points."
1. In Roman Antiquity, a tablet on which the praetor's edicts and other public notices were recorded for public information; afterwards extended to other lists.
2. A blank book in which to insert autographs, memorial verses, original drawings, or other souvenirs.
3. A book at public places in which visitors enter their names.

According to Samuel Johnson in his A Dictionary of the English Language, an album is a book in which foreigners have long been accustomed to inserting the autographs of celebrated people.

Freehold estate; land which is the absolute property of the owner; real estate held in absolute independence, without being subject to any rent, service, or acknowledgment to a superior.
This spelling is used widely throughout the world, and was used in the United States before 1927 where the preferred spelling is now: aluminum.
The male portion of a flower.
antebellum (an" tee BEL uhm) (adjective) (no comparative)
A reference to a period just before a war; especially, the American Civil War or the War between the States: So significant was the American Civil War, that the Latin nomenclature of antebellum has been used to characterize the period before the U.S. Civil War, while "postbellum" refers to the time after the Civil War years.