12-Letter Words End with 'um'

There are 21 12-letter words that end with 'um'.

appressorium	archesporium	diverticulum
hibernaculum	epithalamium	infundibulum
nonpetroleum	perionychium	spermagonium
quinquennium	radiothorium	praseodymium
protactinium	prothalamium	pseudopodium
superpremium	superstratum	transuranium
unnilpentium	unnilquadium	xiphisternum

Note: These 21 12-letter words that end with 'um' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words end with ium, lum, rum, tum, num, eum, cum, dum, sum, gum, mum, bum, kum, uum, aum, hum, oum, vum, wum, jum, pum, yum.

3-letter words end with 'um' (10)
4-letter words end with 'um' (16)
5-letter words end with 'um' (39)
6-letter words end with 'um' (84)
7-letter words end with 'um' (102)
8-letter words end with 'um' (156)
9-letter words end with 'um' (132)
10-letter words end with 'um' (106)
11-letter words end with 'um' (65)
12-letter words end with 'um' (21)
13-letter words end with 'um' (9)
14-letter words end with 'um' (7)
15-letter words end with 'um' (5)