There are a total of 149 7-letter words ending in 'um', and the number may vary in different dictionaries. You can specify the dictionary and order.
- agendum 15
- alodium 13
- alyssum 14
- arcanum 15
- baculum 19
- blellum 17
- bluegum 18
- bohrium 16
- cadmium 18
- caesium 14
- calcium 18
- cambium 20
- centrum 15
- chetrum 16
- chillum 18
- clausum 16
- corneum 15
- cranium 15
- crissum 14
- crumbum 21
- decorum 15
- dubnium 17
- eardrum 12
- eluvium 17
- elytrum 14
- erratum 11
- exuvium 23
- fermium 17
- fraenum 15
- frustum 15
- fulcrum 19
- gallium 15
- gentium 14
- hafnium 17
- hahnium 16
- hassium 13
- holmium 17
- hoodlum 15
- humdrum 18
- ignotum 14
- infimum 18
- iridium 12
- ischium 16
- jejunum 31
- jugulum 25
- labarum 15
- ladanum 14
- liberum 15
- libitum 15
- lithium 14
- ludorum 14
- lumpsum 19
- lustrum 13
- maximum 24
- membrum 20
- minimum 18
- modicum 18
- muonium 16
- natrium 12
- niobium 15
- nostrum 12
- oestrum 11
- omentum 15
- opossum 14
- oppidum 18
- optimum 17
- organum 14
- osculum 16
- outswum 15
- pabulum 19
- pallium 16
- panicum 18
- pantoum 15
- pinetum 15
- plumbum 22
- pomatum 17
- popadum 18
- premium 17
- protium 14
- punctum 19
- quantum 22
- rhenium 14
- rhodium 14
- rostrum 11
- sanctum 15
- scrotum 14
- sesamum 14
- sistrum 11
- skellum 17
- skookum 19
- slumgum 18
- smeddum 16
- solanum 13
- sorghum 15
- stadium 12
- stannum 13
- stepmum 17
- sternum 12
- stewbum 17
- stibium 14
- stickum 18
- stratum 11
- taedium 12
- tantrum 12
- tapetum 14
- terbium 14
- tertium 11
- tetotum 11
- thorium 13
- thulium 15
- triduum 13
- tritium 11
- trivium 15
- uranium 13
- uredium 13
- yttrium 13
- zoarium 20
- zoecium 23
- amentum 11
- bifidum 15
- frankum 16
- lythrum 15
- papadum 14
- sourgum 10
- alumium 11
- ballium 11
- elogium 10
- enrheum 12
- erodium 10
- grassum 10
- hummaum 16
- ideatum 10
- mashlum 14
- mesclum 13
- notaeum 9
- offscum 17
- orarium 9
- oxonium 16
- plagium 12
- pythium 17
- rastrum 9
- relatum 9
- seculum 11
- solidum 10
- spodium 12
- stomium 11
- trankum 13
- trinkum 13
- vitreum 12
There are 149 7-letter words ending in um in the well-known word game dictionary, 108 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 133 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 118 in the Words with Friends (WWF) dictionary.
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