at an address

grudging / reluctant admiration 

be much admired

by / on sb's own admission

a frank admission 

make an admission

admit to smb

admit to doing smt

be reluctant / loath to admit smt

adopt an approach

be enthusiastically adopted 

adult supervision

make an advance

state-of-art

new-fangled

big advantage 

work to your advantage

be at an advantage 

there is an advantage in doing smt

consider the merits 

extoll the virtues

recount your adventures

be heavily advertised 

aft

he asked after her health 

aftergame

afters

agape

it took an age to get there

to be of age (to come...)

to be of full age (legal age)

age of criminal discretion

potent agent

cleaning agent

agglomerate

agglutination

aggravate

aggregate

aggressively inclined (if one is so inclined)

aggrieved

aghast

aglitter 

aglow

agnail

agog

agoraphobia 

let us agree to differ

to agree the terms (причем GRAMMARLY.COM не согласны)

oysters don't agree with me

agreeable (weather)

aigrette

ail

ailing

to disappear into thin air

to be up in the air (in abeyance)

to air the dog

airily 

a detailed / true / accurate / vivid / first-hand / blow-by-blow account of

with deadly / pinpont / unerring accuracy 

factually accurate 

prove accurate 

level an accusation against smb

an unfounded / groundless / baseless accusation 

stand accused of 

long accustomed to 

achieve a feat 

a casual / mutual acquaintance 

take / call for / demand action

swing / spring / leap into action

put smth. into action

joint action

MAKE AN ACTIVITY (mistake)

a flurry of action

the principal actor 

aesthete

affability 

to meddle in other people's affairs

to affect indifference 

she affects bright colors

affectation

mental affection

affectionate 

affianced

affidavit

affiliate

affiliated 

you are not affiliated with me

affinity 

I will venture to affirm ...

affirmative approach

he is afflicted with...

affliction

it affords me great pleasure ...

affray

I was most affronted by...

afield 

aflame

afloat

to be afoot

aforethought (malicious)

afresh 

pick up an accent

put on an accent

reluctantly accept 

grudgingly accept 

blindly / unquestioningly accept 

accept sth at face value

morally / ethically acceptable

prove acceptable (none of the solutions proved acceptable)

a freak accident

a hit-and-run accident

a head-on collision

a multiple pile-up

purely / completely accidental

unintentional humor / irony

unintended consequence / impact / outcome

inadvertent error / omission / use

give an account of

write an account of 

acumen

addled bunch

adoration

adorn

adroit

adulate

adulterate  (2) milk

advanced warning (in years, case)

the night is far advanced 

to advance growth 

adventurism

adversary (worthy ...)

adverse (effects)

adversely 

companions in adversity 

advisability

it may be advisable to wait

I advised him against going 

please advise me of receipt 

advisedly

advisory

in an advisory capacity

advocacy 

aegis (under the ... of)

aeons

aeration 

largely abandon

abandon smb to their fate

abandon an idea

was temporarily abandoned 

was abandoned in favor of

considerable ability

an uncanny ability

ability as a teacher

to the best of my abilities

I was conspicuous by my absence 

notable / marked

in the absence of evidence 

absorbing = interesting 

outline the main points

hurl abuse at me

shower me with abuse / heap abuse on me

actionable 

acuity (of vision)

acute

addenda (pl. addendum)

addle (bunch)

address the parcel / oneself to the audience / oneself to smth

adequate to his post

adhesion 

ad infinitum 

adjoin

adjudge

adjuration

adjure

ad-lib

admeasure

admirably written

admittance / deny my admittance to

admittedly 

admonish / were admonished for being late 

I conceive it my duty to admonish you 

admonition 

ado

adopt the attitude 

adopt religion 

by accretion of

interest accrued to my account

accusatory 

acerbic

acerbity 

acid wit

developed quite an acid tongue lately

acock

acolyte

acquiesce 

acquiescence

acquirement 

acquisitive mind

acquit debt

acrid

acridity

acrimonious (dispute)

acrimony 

acrophobia

with arms across

get in on the act 

get your act together

accede ( to a treaty )

accentuate 

problem is accentuated by

accession

acclaim

accommodate

a hall accommodating 300 people

accomplish one's end

accord

of my own accord

he was accorded a hearty welcome

this would accord with common sense 

according as the demand increases, prices go up (хотя по идее всегда ACCORDING TO)

give a good account of

by all accounts

how do you account for being absent? (=explain)