Geographic Superlatives
Wordplay-Pourri
Think Pink
Stately Rivers
Now for the secret word
100

At 29,032 feet up, atop this highest mountain, you'll be on top of the world

Mount Everest 

100

Only one vowel:
The main building of a parish

Church

100

This title object of a 1963 film doesn't refer to a large feline but to a large gem targeted by a thief

The Pink Panther 

100

John Wesley Powell was one of the first to explore the Grand Canyon by boat on this river

The Colorado 

100

The government says you can't get that info because it has this 10-letter designation, like a newspaper ad section

Classified 

200

At about 3.3 million square miles, this largest desert covers an area that's almost equal to that of the United States

The Sahara 

200

Crossword clues "P":
Next to the last (11 letters)

Penultimate 

200

In 1939 Paul & Betty Pink began selling soda & these from a cart on La Brea & Melrose in L.A. & the rest is history

Hot Dogs 

200

Its name derived from words for "truth" & "head", Lake Itasca is the head or starting point for this river

The Mississippi 

200

An article of clothing & a pointy weapon form this intrigue-laden idiom

cloak-and-dagger

300

This largest bay is part of the Indian Ocean

The Bay of Bengal 

300

5-syllable words:
A person aged 100 years or older

Centenarian 

300

Introduced in 1957, this brand was packaged in little pink packets so that it would stand out in sugar bowls

Sweet'n Low

300

Great Falls, Montana was named for the nearby falls of this river

The Missouri 

300

This double-talk term can be a command for silence, but more often refers to a matter of utmost secrecy

hush-hush

400

Located in Venezuela, it has the longest uninterrupted drop of any waterfall

Angel Falls

400

Change a letter:
A convenient way to get your bills paid & an examination of a body after death

Autopay to autopsy 

400

2020 marked the 20th anniversary of this fashion designer's Pink Pony initiative to fight cancer

Ralph Lauren 

400

The Schuylkill & Lehigh Rivers are tributaries of this river

The Delaware 

400

"P" is for this word that refers to communication that's protected from compelled disclosure in a court of law

Privileged  

500

Covering over 140,000 square miles, it's the world's largest inland body of water

Caspian Sea

500

Overlaps:
Home city of the NHL sabres
+
a type of leather step-in shoe

A Buffaloafer 

500

In Hawaii, these flowers, often with a touch of pink, are popular for leis

Plumeria 

500

It empties into Long Island Sound between the towns of Old Saybrook & Old Lyme

The Connecticut River 

500

Secret agents have been known to travel this way, from Latin for "unknown"

Incognito