treatment; service; handling (of a machine, tool, etc.); operation; treating as; treating like
possibility; potential; expandability
source (of a spring, etc.); source (of payment, energy, knowledge, etc.); origin; wellspring
instability; insecurity; crankiness
stability; security; equilibrium
maintenance; preservation; improvement
restoration; repair; mending
comprehension; consent; understanding; OK; roger (on two-way radio)
easy; likely to ...; have a tendency to ...; easy to ...
present condition; existing state; status quo; current state
amendment; correction; revision; modification; alteration; retouching
very; awfully; exceedingly; (not) at all; by no means; simply (cannot)
difficulty; hardship; trouble; infeasibility; inability (to carry out)
to collect; to gather; to arrange; to put in order; to make uniform; to make even
artificial; man-made; human work; human skill; artificiality
chemical reaction; generation of an unexpected result from combining things
to lock up; to shut up; to imprison
rubbish; trash; garbage; refuse
to collect; to gather; to save; to accumulate; to pile up
to throw away; to cast away; to abandon; to desert; to give up; to resign
healthy; robust; strong; solid; durable
maximum preference; maximum priority; priority handling
number one; first; best; most; game; round
to mind (negative nuance); to care about; to worry; to pay undue (amount of) attention to (something)
surely; undoubtedly; sternly; severely; having no slack; rigid
(following a verb) to be sure to; to do (something) so that ...; to make sure to; to try to
very hard; with utmost effort; as hard as one can; with all one's might; for dear life; eagerly
complete; completion; perfection; accomplishment
wrong; not good; hopeless; past hope; must not do
interior; inside; internal
fixed; settled; constant; definite; uniform; regularized
existence; being; survival; to exist; to live; to survive
background; scenery; background (of an incident, situation, etc.); circumstances; backing; support (from behind the scenes)
prevention; precaution; protection against
explanation; exposition; description; account; caption; legend