opponent; rival; adversary; menace; danger; threat
organization; organisation; structure; construction; system (e.g. railroad, transport, party, etc.); tissue; texture (of a rock)
information; news; information (data contained in characters, signals, code, etc.); informatics (as a subject)
not yet known; unknown; strange
such things as ...; and ... and; the minute (that) ...; no sooner than ...; be; is; o
level; standard; level (amount or quantity); level (plane); level (instrument); spirit level
to understand; to comprehend; to become clear; to be known; I know!; I think so too!
mole; whistle-blower; informant; adulterer; adulteress
to be (of animate objects); to exist; to stay; to be ...-ing; to have ...-ed; to be ...-ed
tactics; strategy; military operation; naval operation
infiltration; sneaking in; going undercover
route; path; channel (e.g. sales, distribution)
until (a time); till; to (a place or person); as far as; to (an extent); up to
being heard (by others); being overheard; being leaked (of plans, secrets, etc.); going in one ear and out the other
if one is unlucky; if one is careless
total destruction; complete destruction; annihilation; total defeat; complete failure
hey; you; hey; hey; hold on; yo
authentic; credible; creditworthy; dependable; reliable; sound
extent; degree; limit; bounds; (span of) time; (a) distance; the state of
achievements; actual results; accomplishments; past results; track record
to pile up; to heap up; to stack up; to repeat many times over; to go through repeatedly; to accumulate
next (to); adjoining; adjacent; house next door; neighbouring house; next-door neighbour
human being; human; person; character (of a person)
confidence; trust; faith; credit
(if) by some chance; by some possibility; in the unlikely event that; (unlikely event of) emergency; the worst(-case scenario)
treachery; betrayal; perfidy
vigilance; caution; alertness; precaution; being on guard
doubt; suspicion; question; strangeness
dot; spot; mark (in an exam, etc.); grade; point (in a game); score; point
to be; to exist; to have; to be located; to be equipped with; to happen; to come about
if; in case; as for; on the topic of; if that's the case; if so
direct; immediate; personal; firsthand
to hear; to listen (e.g. to music); to ask; to enquire; to hear about; to hear of; to follow (advice, order, etc.)
to see; to look; to examine; to look over; to look after; to attend to; to experience
good; excellent; sufficient; enough; profitable (deal, business offer, etc.); beneficial
to include (in a group or scope); to instruct; to make one understand; to include (a nuance); to put in (an implication); to put in (someone's) mouth
any more; anymore; any further; any better; any longer
anxiety; uneasiness; worry; apprehension; fear; insecurity
element; component; factor; element (e.g. in array); member (e.g. data structure)
war potential; military strength; fighting power; ability (to compete); capabilities; valuable asset