What are the word groups explored?

Exploratory words:

Explore,

Visit,

Drilling holes,

Testing,

Testing,

Explore,

Spying,

Inquiry,

Explore secluded places,

Explore the road,

A spy,

Spy,

Probe,

Tango,

Visit,

Prospecting,

Sit down,

Visit,

Detective,

Wind detection,

Testing,

Visiting patients,

Probe,

Ask questions,

Explore,

Explore home,

Adventure,

Spy,

Visit the prison,

Detective cases,

Discuss,

Explore,

Visiting relatives,

Explore,

A spy,

Explore,

Espionage,

Explore horses,

Explore victory,

explore