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E
100

The act of putting the parts of something together

Assembly

100

a difficult task or problem

challenge

100

a structure that covers or protects people or things

shelter

100

pleasant in an-old fashioned way

quaint

100

a synonym for cultivate

grow, raise

200

a large amount of something that comes suddenly

blizzard

200

a thing that you plan to achieve or do

intent

200

something that has a very bad result or effect

disaster

200

happening without being directly controlled by a person

automatic

200

a synonym for establish

begin, create
300

to plan something at a certain time

schedule

300

to use machines to make something in large amounts

manufacture

300

to meet and cross at a point

intersect

300

a source of danger

hazard

300

antonym for fertile

barren, dead

400

the act of moving forward toward a goal

progress

400

a shortage of rainfall for a long period of time

drought

400

to leave a place; to go away from a place

desert

400

a machine that is unusual or strange

contraption

400

antonym for moist

dry

500

to do something in a new way

innovate

500

the top layer of soil in which plants have most of their roots

topsoil

500

to make something slippery or smooth by adding a liquid, such as oil

lubricate

500

operating well without wasting materials, energy, etc.

efficient

500

synonym for zone

area