gem; jewel; precious stone
historic ruins (remains, relics); archeological site
et cetera; etc.; and the like; and so forth
a lot; lots; enough; sufficient; enough; too many
seems to be; appears to have; supposed to be
altitude; height; elevation; high-degree; high-grade; advanced
metre; meter; meter; gauge
maintenance; preservation; improvement
irregularity; unsteadiness; disorderly
to drift; to float; to waft (e.g. a scent); to hang in the air; to be in the air (e.g. a feeling or mood); to wander; to walk around aimlessly
investigation; examination; inquiry; enquiry; survey
difficult; hard; impossible; unfeasible; fussy; particular; gloomy
existence; being; survival; to exist; to live; to survive
area; domain; territory; field; range; region
the world; society; sphere; circle; world-renowned; world-famous
majority; more than half; most (of); mostly; largely; mainly
chaos; confusion; disorder; chaotic; confused; uncertain
to cover; to hide; to conceal; to wrap; to disguise
time; hour; period; class
to pass (time); to spend; to overdo (esp. of one's alcohol consumption); to drink (alcohol); (arch.) to take care of; (arch.) to support
invasion; incursion; raid; aggression; intrusion; trespass
to refuse; to reject; to decline; to prevent (from doing); to deny (e.g. access); to block
getting rich quick; making a killing; making a fortune at a single stroke
question (e.g. on a test); problem; problem (e.g. societal, political); question; question (i.e. doubt); public discussion
association; society; organization; organisation
permission; approval; authorization; to permit; to authorize
excavation; exhumation; discovery (e.g. new talent)
everything; all; the whole; entirely; completely; wholly
though; although; be that as it may; nonetheless
advance warning; previous notice; announcement; herald; harbinger; forerunner
everyone; everybody; all; everything; all
while surprised; suddenly
to face; to go towards; to head towards
to shine; to glitter; to sparkle
to approach; to draw near; to be imminent; to press (someone for something); to urge; to compel
natural; understandable; reasonable; no wonder
where ... is concerned; when it becomes; if it becomes
to engage in; to participate in; to take part in; to be involved in