This company offers crop insurance as well as it signature green & yellow tractors
John Deere
Cheerleaders know it traditionally precedes "sis, boom, bah!"
rah rah
One has St. Louis, the other has East St. Louis
Missouri & Illinois
Alkali flats, like the ones named for Mr. Bonneville, have very high concentrations of this, NaCl
sodium chloride (salt)
It can mean "universal" or refer to a particular Christian denomination
catholic
This candy brand invites you to "taste the rainbow"
Skittles
In 1983, there was no harmony at this New York prison when inmates rioted over poor conditions
Sing Sing
Hoover Dam is on their border
Nevada & Arizona
Touting the "Zetetic Method", this "Society" believes our planet is not spherical
the Flat Earth Society
Mystifying, or using code
cryptic
This brand of cleaning product is represented by the cute little guy seen below

Scrubbing Bubbles
In an '80s hit it precedes "keep it down now, voices carry"
Hush, hush
The state where Martin Luther King was born & the state where he married Coretta Scott
Alabama & Georgia
Flukes are a type of this invertebrate
flatworms
It's distilled from white wine & is named for a city in western France
cognac
[DD]
Treat your itchy eyes with this brand of antihistamine first marketed back in 1946
Benadryl
Recipes for this fish include Macadamia Nut Crusted & Grilled Tacos
mahi-mahi
[DD]
The big land buy named for one also got us the other
Louisiana & Arkansas
Published in 1935, it's named for a district once near Monterey
Tortilla Flat
Having a common center
concentric
A military parachute duffle inspired this brand of nylon totes with a French-sounding name
LeSportsac
German health plans cover visits to a spa, including this one at the foothills of the Black Forest
Baden-Baden
One has Rocky Mountain National Park, one has Cherokee State Park
Colorado & Oklahoma
From Hindi for "flat" comes the 7-letter name of this unleavened bread of India
chapati
This era of geologic time includes the Tertiary & Quaternary periods
the Cenozoic