experimental; provisional
introduction; bringing in; installation; introduction (to a story, lecture, etc.); introductory part
to drive into (e.g. a nail into a board); to hit into (e.g. a home run into the stands); to throw into (e.g. jail); to drum into (someone) (an idea, skill, etc.); to hammer into
competition rate; success rate; ratio of successful (applicants) to total applicants
to entrust (to someone); to leave (in someone's hands)
duty; function; office; mission; task; role
excavation; exhumation; digging up; discovery (of a new fact, talent, etc.); finding; unearthing
confidence; trust; faith; credit
to wager; to bet; to risk; to stake; to gamble
recommendation; referral; endorsement
immediately; at once; instantly
top brass; upper echelon; higher-ups; top management; upper reaches; top of the pile
success in life; getting ahead; successful career; promotion; climbing the corporate ladder; eminence
calm; quiet; gentle; moderate; reasonable; amicable
philosophical view; looking at philosophically; long view; farsighted view
otherwise; if not; or else
to be sacked; to be fired; to be dismissed; to be beheaded
disposal; throwing away; dealing with (a problem); measure; punishment; penalty
irregular; bad bounce (in tennis); bad hop (in baseball)
but I suppose; it seems; probably; I guess
painful; being sorry; feeling sorry
sometime; someday; one day; some time or other; the other day; in due course
lesson; precept; teachings; moral
early; a little earlier than usual; a little faster than usual; slightly quicker
great difference; big difference; wide margin
income; earnings; revenue; proceeds; takings; receipts
tolerance level; permissible range; acceptable limits
outside ...; beyond ...; not included in ...
to do something by choice; to like; to be fond of
to be (of animate objects); to exist; to stay; to be ...-ing; to have ...-ed; to be ...-ed
lingering attachment; lingering affection; regret; reluctance; ruefulness
well-informed person; walking dictionary; extensive knowledge
it's better to; it's best to; it's safest to; you can't go wrong with; it doesn't hurt (to be young, beautiful, have money, etc.)
time; season; period; phase; stage
8th day of the month; eight days
10th day of the month; ten days
inspection; study by observation; field trip; sitting out (e.g. PE class)
plot of land; lot; soil; locality; region; place
model; pattern; paragon; exemplar
to support; to maintain; to bring up; to raise; to adopt (a child); to cultivate (a habit, a quality, etc.)