ADJ

big, considerable, dramatic, enormous, great, high, huge, important, main, major, massive, powerful, profound, real, significant, strong, substantial, tremendous
a high-impact message aimed at changing high risk behaviour among drug-users
limited, marginal, minimal/minimum, negligible
full
The industrial north of the country felt the full impact of the recession
maximum
We'll show you how to dress for maximum impact at the all-important audition
overall, total
growing, increasing
added
disproportionate
uneven
the uneven impact of the debt crisis on developing countries
aggregate, combined, cumulative
considering the cumulative impact of a series of damaging events
decisive
direct
The railways made a direct physical impact on the landscape
immediate, instant
initial, short-term
lasting, long-term
far-reaching, wider
It is important to appreciate the wider impact and implications of this proposal
future, likely, possible, potential
beneficial, favourable, positive
adverse, catastrophic, damaging, devastating, disastrous, heavy, negative, serious, severe
human
The severest human impact on the dolphins has been the loss of habitat
personal
The personal impact of party leaders has been very important
physical, visual
seeking to reduce the visual impact of wind farms on the landscape
cultural, ecological, economic, emotional, environmental, financial, health, political, psychological, social
The environmental impact of power generation is being assessed

VERB + IMPACT

achieve, create, exert, have, make
Variations in the interest rate will have an impact on the whole housing market. You certainly made a big impact on Carter
feel
The initial impact of the reforms will be felt most keenly in primary schools
analyse, assess, consider, evaluate, examine, explore, judge, measure, monitor, study
It is difficult to judge the likely impact of the changes on employment patterns
enhance, increase, maximize
alleviate, cushion, lessen, minimize, reduce, soften
We are trying to minimize the impact of price rises on our customers
diminish, lessen, reduce, weaken
Listening to the speech through an interpreter lessened its impact somewhat
lose
When peace returned, the hardline message lost much of its impact
resist, withstand
This section explores how mothers resist the impact of poverty on the health of their children
be concerned about
appreciate
highlight
address
predict
reflect
Architecturally, these churches reflected the impact of the Renaissance

PREP

under the ~ of
Manufacturing fell sharply under the impact of the recession
~ on/upon
to highlight the impact of technology on working practices

ADJ

full
initial

VERB + IMPACT

take
The front coach of the train took the full impact of the crash
feel
absorb
A well-designed sports shoe should absorb the impact on the 28 bones in each foot
lessen, soften
Air bags are designed to soften the impact for crash victims
survive, withstand
The crew of six may have survived the initial impact, but the whole plane went up in flames seconds later

IMPACT + VERB

occur
Impact occurred seconds after the pilot signalled for help
knock sb/sth …
The impact knocked him off balance

IMPACT + NOUN

speed
crater
Small meteorites have left impact craters all over the planet's surface

PREP

on ~
The front of the car had crumpled on impact

PHRASES

the moment/point/time of impact