How many words can you think of that become new words when the letter O is added at the end? For example, LIMB + O - LIMBO. Abbreviations and informal words are acceptable. Ignore capitalization. There are at least 12 words.

(Possible) Answers:

SUM
PINT
MAY
VET
LOG
LIMB
HELL
LASS
BUNK
BING
CELL
DINER