These words are from the IELTS 4000 Academic Word List and the sample sentences are taken from Cambridge free online dictionary.
adhere: (verb) stick fast; stick to firmly; be compatible or in accordance with
A smooth, dry surface helps the tiles adhere to the wall.
adhesive: (noun) glue; paste ; substance that unites or bonds surfaces together
You'll need a/some strong adhesive to mend that chair.
adjacent: (adjective) adjoining; neighboring; close to; lying near
They work in adjacent buildings. /They lived in a house adjacent to the railway.
adjust: (verb) adapt; regulate
As a teacher you have to adjust your methods to suit the needs of slower children.
adjustment: (noun) making or becoming suitable; adjusting to circumstances
She made a few minor adjustments to the focus of her camera.
administer: (verb) govern; supervise; give or apply medications
The economy has been badly administered by the present government.
administration: (noun) management; supervision; people who are in charge for management; activity of government for powers and duties
The decision to cancel the trip was made by the school administration.
administrative: (adjective) of or relating to or responsible for administration
Your responsibilities will be mainly administrative.
admiration: (noun) favorable judgment; feeling of pleasure, wonder, and approval
My admiration for that woman grows daily.
admire: (verb) regard with wonder or astonishment; view with surprise; marvel at
We stood for a few moments, admiring the view.
admission: (noun) act or practice of admitting; power or permission to enter
Her silence was taken as an admission of guilt/defeat.
admit: (verb) permit to enter; receive; provide the right or a means of entrance to
He admitted his guilt/mistake.
admittedly: (adverb) doubtlessly; in an acknowledged manner; confessedly
Admittedly, I could have tried harder but I still don't think all this criticism is fair.
adolescence: (noun) state of growing up from childhood to manhood or womanhood; transitional period between youth and maturity
She had a troubled adolescence.
adopt: (noun) accept; take on; raise; take into one's family
They have no children of their own, but they're hoping to adopt.
adoption: (noun) act of accepting with approval
The last ten years have seen a dramatic fall in the number of adoptions.
adore: (verb) worship with profound reverence; pay divine honors to; regard with the utmost esteem and affection
Let us adore God for all his works.
adorn: (verb) enhance or decorate with or as if with ornaments
The bride's hair was adorned with white flowers.
adornment: embellishment; decoration; something that beautifies or adorns; ornament
The adornment in the church for the wedding is pretty amazing.
adult: (noun) one who has attained maturity or legal age; fully grown
An adult under English law is someone over 18 years old.
advance: (verb) proceed; move forward; improve; moving forward
The fire advanced steadily through the forest.
advanced: improved; highly developed or complex; ahead of the times; progressive
This is the most advanced type of engine available.
adversary: (noun) opponent in contest; someone who offers opposition
He saw her as his main adversary within the company.
adverse: (adjective) in opposing direction; harmful or unfavorable; acting or serving to oppose
The match has been cancelled because of adverse weather conditions.
adversity: (noun) state of misfortune, hardship, or affliction; misfortune
The road to happiness is paved with adversities.
advertise: (verb) give notice to; inform or apprise; make known; give public notice of
He advertises his services on the company notice board.
advisable: (adjective) proper to be advised or to be done; expedient; prudent; ready to receive advice
A certain amount of caution is advisable at this point.
advocate: (verb) speak, plead, or argue in favour of; plead for; push for something
He advocates the return of capital punishment.
aerial: (adjective) of the air or atmosphere; produced by or found in the air; performed in the air
Meanwhile, the massive aerial bombardment/bombing of military targets continued unabated.
affect: (verb) have an emotional or cognitive impact upon
The divorce affected every aspect of her life.
affection: (noun) fondness; tender feeling toward another; fondness
She felt no affection for the child.
affectionate: (adjective) having affection or warm regard; loving; fond; kindly inclined; zealous
He's an affectionate little boy.
affiliate: (verb) associate; incorporateThe school is affiliated with a national association of driving schools.