How many words end in UM?

713, ranging from 2 to 15 letters.

What is the best scoring word that ends with UM?

QUINQUENNIUM, worth 32 points in Scrabble.

ARCHAEBACTERIUM and CORYNEBACTERIUM, at 15 letters.

713 words end in UM, with QUINQUENNIUM the highest scoring at 32 points.

Showing the highest-scoring of 713 words. The pages linked below split the rest into smaller lists.

The dictionary contains 713 words that end in UM — set out here by length.

Lengths span 2 to 15. The middle of that range is where the words are: 149 of them are 8 letters long.

If you are playing for score, QUINQUENNIUM at 32 points is the pick. It tops both tables: 39 in Words With Friends as well.

The full 15 letters are used by ARCHAEBACTERIUM, CORYNEBACTERIUM and MICROSPORANGIUM.

If you need a narrower cut, the pages linked below split this set by letter and by length.

archaebacterium: considered ancient life forms that evolved separately from bacteria and blue-green algae
corynebacterium: any species of the genus Corynebacterium
microsporangium: a plant structure that produces microspores
disequilibrium: loss of equilibrium attributable to an unstable situation in which some forces outweigh others
megasporangium: a plant structure that produces megaspores

How many words end in UM?: 713, ranging from 2 to 15 letters.
What is the best scoring word that ends with UM?: QUINQUENNIUM, worth 32 points in Scrabble.
What is the longest word that ends with UM?: ARCHAEBACTERIUM and CORYNEBACTERIUM, at 15 letters.