400 must have words

abandon

forsake; leave behind

adversely

in an opposing or negative manner

aggregate

a sum total of many heterogeneous things taken together

cultivation

production of food by preparing the land to grow crops

intensify

increase in extent or strength

irrigation

the act of supplying dry land with water by artificial means

obtain

come into possession of

photosynthesis

formation of compounds in plants aided by radiant energy

precipitation

the falling to earth of any form of water

anticipate

regard something as probable or likely

catastrophic

extremely harmful; bringing physical or financial ruin

collide

crash together with violent impact

eruption

the sudden occurrence of a violent discharge

famine

a severe shortage of food resulting in starvation and death

flood

the rising of a body of water and its overflowing onto land

impact

the striking of one body against another

persevere

be persistent

adapt

make fit for

diverse

distinctly dissimilar or unlike

evolve

undergo development

feature

a prominent attribute or aspect of something

generation

group of genetically related organisms in a line of descent

inherent

existing as an essential constituent or characteristic

migration

the movement of persons from one locality to another

physical

involving the body as distinguished from the mind or spirit

process

a particular course of action intended to achieve a result

survive

continue in existence after

constraint

the state of being physically limited

deplete

use up

dispose

give

emission

the act of causing to flow forth

reservoir

lake used to store water for community use

shrink

wither

stable

resistant to change of position or condition

adjust

alter or regulate so as to conform to a standard

arbitrary

based on or subject to individual discretion or preference

denominator

the divisor of a fraction

exponentially

in a manner of rapid growth

infinitesimal

immeasurably small

maximize

make as big or large as possible

parallel

being everywhere equidistant and not intersecting

proportion

relation with respect to comparative quantity or magnitude

sequence

a following of one thing after another in time

accuracy

the quality of being near to the true value

adjacent

having a common boundary or edge

compress

squeeze or push together

overlap

extend over and cover a part of

retain

secure and keep for possible future use or application

seep

pass gradually or leak or as if through small openings

structure

a complex entity made of many parts

corrode

cause to deteriorate due to water

derive

come from

detection

the perception or discovery that something has occurred

expeditiously

with efficiency; in an efficient manner

implement

a piece of equipment or a tool used for a specific purpose

maintenance

activity involved in keeping something in good working order

simulation

the act of imitating the behavior of some situation

innovative

introducing new ideas or creative methods

combustion

a reaction of a substance with oxygen to give heat and light

component

one of the individual parts making up a larger entity

convey

transmit or serve as the medium for transmission

discrete

constituting a separate entity or part

nucleus

a part of the cell responsible for growth and reproduction

permeate

spread or diffuse through

rotate

turn on or around an axis or a center

solar

relating to the sun or utilizing the energies of the sun

source

the place where something begins

trigger

lever that activates the firing mechanism of a gun

acquisition

something gained

anomaly

deviation from the normal or common order

degrade

reduce in worth or character

gap

an open or empty space in or between things

indisputable

not open to question; obviously true

intervene

be placed or located between other things

recede

pull back or move away or backward

retrieve

get or find back; recover the use of

agnostic

a person who claims the existence of God is unknowable

animism

the doctrine that all natural objects have souls

atheist

someone who denies the existence of god

inclined

at an angle to the horizontal or vertical position

contemplate

think intently and at length

ecclesiastical

of or associated with a church

exalt

praise

pious

having or showing or expressing reverence for a deity

sacrifice

the act of killing in order to appease a deity

aggravate

make worse

decrepit

worn and broken down by hard use

disease

an impairment of health

persist

refuse to stop

prognosis

a prediction of the course of a disease

terminal

occurring at or forming an end

vein

a blood vessel that carries blood toward the heart

wound

an injury to living tissue

anesthesia

loss of bodily sensation

augment

enlarge or increase

implant

fix or set securely or deeply

obese

excessively large

procedure

a particular course of action intended to achieve a result

scar

a mark left by the healing of injured tissue

divination

the art or gift of prophecy by supernatural means