Barron's 5

to believe

• stimulate

• dementia

• regulate

• deem

the situation of becoming worse

• vacancy

• deterioration

• epidemic

• investigation

spreading out of control

• aerobic

• substance

• rampant

• complex

seriousness

• theoretical

• gravity

• rodent

• diagnose

to keep

• retain

• link

• absorb

• alleviate

basic

• desirable

• chronic

• rudimentary

• qualified

originate

• stem

• administer

• manufacture

• counteract

damaged

• spatial

• impaired

• toxic

• primary

weaken

• enhance

• ascertain

• fraction

• cripple

to happen again

• outcome

• standpoint

• stave off

• recur