crazy
half-baked
meshuga
meshugga
meshugge
meshuggeneh
meshuggener
quixotic
romantic
screwball
soft-headed
unfunctional
unwieldy
utopian
wild-eyed
abstract
academic
airy
armchair
autistic
awkward
beyond one
bulky
clumsy
conjectural
contrary
crosswise
cumbersome
dereistic
hulking
hulky
hypothetic
ideal
idealistic
impracticable
in the clouds
inconvenient
ineffective
ineffectual
infeasible
inoperable
insuperable
insurmountable
moot
nonfunctional
nonrealistic
notional
otherworldly
perverse
poetic
ponderous
postulatory
romancing
romanticized
speculative
starry
starry-eyed
storybook
theoretical
too much for
transcendental
transmundane
unachievable
chimerical
fanciful
illogical
inaccurate
inappropriate
inefficient
inept
irrelevant
pointless
unacceptable
unfounded
unpractical
unreal
unrealistic
unreliable
unsatisfactory
unscientific
untenable
untrue
practical
tactical