Duller
The Century Dictionary and Cyclopedia
noun.
One who or that which makes dull.
the GNU version of the Collaborative International Dictionary of English
noun.
One who, or that which, dulls.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
comparative
form of
dull
: more
dull
noun.
One who, or that which, dulls.
Word Usage
"It was competent and workmanlike but its shopping list of initiatives recalled his duller budgets."
Rhyme
Words with the same terminal sound
Muller
color
culler
discolor
muller