dungeon; dungeon (in an RPG or video game); (underground) labyrinth
connotation; comprehension; intension; inclusion; containment within
chief; main; principal; major
centre; center; middle; capital; seat of government
immediately; at once; soon; before long; easily; readily
spire; steeple; pinnacle; minaret
outskirts; environs (of a city); surrounding area; surroundings
type; kind; type (of person); (ideal) type; typewriter; typing (on a typewriter)
to conform to; to agree with; to be adapted to; to be based on
one by one; one each; one at a time
contents; interior; substance; content; (sword) blade
one-eyed; first (in a series); initial
busyness; a lot of things to do; frequent use; heavy use (of); many uses
(made of) stone; stone-built
structure; construction; makeup; framework; organization; pattern
scaffold; scaffolding; foothold; footing; foothold (e.g. in business); foundation
underground; below the ground; world of the dead; the grave; underground (activities, movement, etc.); secret
complex; complicated; intricate; mixed (feelings)
terrain; geographical features; topography
a great variety of; diversity
rampancy; prevalence; domination
release; unleashing; liberation; deallocation (of computer memory)
main; principal; main dish; main course; main part; principal part
hunting ground; hunting preserve
class (of students); group (of people); party; lot; bunch; crime family; organized-crime syndicate
talented person; person known for real ability rather than looks
to set foot into; to enter; to step inside; to cross the threshold
untrodden (region, field of study, etc.); unprecedented (discovery, achievement, etc.)
undeveloped (area); unexplored (field of study); wild (areas); untapped area
to be excited; to be nervous; to be thrilled
to peek (through a keyhole, gap, etc.); to look down into (a ravine, etc.); to peek into (a shop, bookstore, etc.); to sneak a look at; to take a quick look at; to peep (through a telescope, microscope, etc.); to stick out (a scarf from a collar, etc.)
collecting; accumulating; collection (of art, stamps, insects, etc.); garbage collection; waste collection
to scurry home; to run home; to fly back
(good) result; outcome; fruits (of one's labors); product; accomplishment
execution (e.g. of a plan); carrying out; (putting into) practice; execution (of a program); run
how many people; a number of people
success; achievement; succeeding (in life); (worldly) success; prosperity