tidy
austere
bare
basic
chaste
chipper
elementary
essential
fundamental
groomed
homely
homespun
homogeneous
indivisible
irreducible
mere
monolithic
neat
of a piece
orderly
plain
primal
primary
pure
pure and simple
severe
shipshape
simon-pure
simple
single
snug
spare
spick-and-span
stark
trig
trim
unadorned
undifferenced
undifferentiated
uniform
well
alarm-armed
beech mast
close-shaven
cloth-yard
flywheel
half-ton
hayloft
l-shaped
low-heeled
number-three
one-page
over-respectful
rolltop
self-service
snazzy
sun-washed
three-tiered
torpedo-shaped
ungood
untrod
waddling
well-tailored
buttered
cluttered
fluttered
guttered
muttered
shuttered
sputtered
uttered