academic
alone
anxiety
assignment
bed
bedroom
book
concerned
depression
disorder
divorced
education
evening
exam
examination
exhausted
frustration
health
illness
insomnia
learning
man
night
nightmare
novel
pain
preparing
puzzled
reading
research
revising
sadness
sick
single
sleep
sleeping
sleepless
sleeplessness
sleepy
stress
stressed
student
studying
suffering
textbook
thesis
thinking
tired
upset
worried