hard-headed
obstinate
realistic
stubborn
unregenerate
balking
balky
bigoted
bulldogged
bulletheaded
bullheaded
case-hardened
dogged
dogmatic
down-to-earth
earthy
fanatic
hard
hard-boiled
headstrong
hoaxproof
intolerant
matter-of-fact
mulish
not born yesterday
opinionated
overzealous
persevering
pertinacious
pigheaded
positivistic
practical
practical-minded
pragmatic
rational
realist
reasonable
restive
sagacious
sane
scientific
scientistic
secular
self-willed
sensible
set
shrewd
sober
sober-minded
sophisticated
sound
sound-thinking
astute
canny
clear-headed
common sense
enterprising
farsighted
german-born
hardworking
industrious
liberal-minded
prudent
quick-witted
reputable
strong-minded
thrifty
unimaginative
unprejudiced
well-informed
well-to-do