A
B
C
D
E
100

the adjective of 'function'

functional

100

the adverb of 'environment'

environmentally

100

the noun of 'efficiently'

efficiency

100

the adverb of 'responsibility'

responsibly

100

the adjective of 'environment'

environmental

200

not new, used by someone else (adj)

second-hand

200

able to last a long time without being damaged (adj)

durable

200

very tall building (n)

skyscraper

200

to fall down (v)

collapse

200

the adjective of 'architecture'

architectural

300

possible, something that can happen (adj)

potential

300

the edge of a city (n)

outskirts

300

characteristics/parts of something (n)

features

300

protection of plants/animals/natural areas from being damaged by humans (n)

conservation

300

to change something totally (v)

transform

400
making us feel sad/upset/have a low mood (adj)
depressing
400

to expect that something will happen (v)

anticipate

400

to get something (v)

obtain

400

happening now/modern (adj)

contemporary

400
getting the result you want without wasting time, resources, etc. (n)

efficiency

500

the job of planning buildings to make sure they are strong enough (n)

structural engineer

500

when both sides who disagree give up something in order to make a deal (n)

compromise

500

related to the topic (adj)

relevant

500

examples of this are: sports centres, libraries, supermarkets, etc. (n)

amenities

500

a natural area around a city where no one is allowed to build anything (n) 

green belt