dull
blah
bland
boring
colorless
dense
dingy
dismal
drab
dreary
flat
insipid
prosaic
slow
tedious
thick
tiresome
two-dimensional
unexciting
unimaginative
uninteresting
vapid
wearisome
wishy-washy
7-31
ITA
aureate
basophilic
bluish-grey
brass-colored
buildable
cactus-like
chocolate-brown
close-growing
dicotyledonous
duskier
germinative
miasmic
milky-white
moss-like
pinkish-red
purplish-grey
ruddier
scantier
too-a
yellow-gray