Adjectives
Nouns
Verbs
Adverbs
Antonyms
100

quick

fast, rapid

100

begin

start, commence

100

to allow

let, permit

100

rapidly

quickly

100

advantage

disadvantage

200

hard

difficult

200

essay

article, text, composition, paper, thesis, dissertation, piece of writing

200

to finish

end, terminate, complete

200

joyfully

happily, cheerfully, merrily

200

important

unimportant

300

rude

impolite, unfriendly

300

result

consequence, outcome

300

to sum up

to conclude, to summarise

300

recently

lately

300

ethical

unethical
400

false

untrue, wrong, incorrect

400

assignment

assessment, evaluation, task, 

400

to find

to discover, to locate

400

badly

poorly, imperfectly, incorrectly, awfully

400

significant

insignificant

500

old

ancient, elderly

500

references

citations

500

to reference

to cite

500

well

ably, adeptly, expertly, nicely, skillfully

500

a privilege

a right

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