affect vs. regard

affright vs. terror

affright vs. scare

affright vs. fright

affright vs. frighten

abashment vs. bashfulness

ardor vs. fire

ardor vs. ardour

ardor vs. elan

ardour vs. fire

ardour vs. elan

amazement vs. astonishment

algolagnia vs. algophilia

awe vs. veneration

anxiety vs. anxiousness

anxiousness vs. disquiet

agony vs. torment

agony vs. excruciation

ambivalence vs. ambivalency

anguish vs. torment

anguish vs. hurt

appetency vs. appetite

appetence vs. appetite

ataraxis vs. repose

amorousness vs. eroticism

amorousness vs. erotism

amorousness vs. sexiness

amativeness vs. amorousness

amorousness vs. enamoredness

appreciativeness vs. gratefulness

animosity vs. animus

avidity vs. eagerness

avidness vs. eagerness

aliment vs. nourishment

aliment vs. nourish

aliment vs. nutrify

affection vs. heart

afters vs. sweet

ambrosia vs. nectar

ambrosia vs. ragweed

ambrosia vs. bitterweed

ambrosia vs. beebread

appetiser vs. appetizer

appetizer vs. starter

aubergine vs. eggplant

ananas vs. pineapple

annon vs. sweetsop

ackee vs. akee

ail vs. garlic

ail vs. trouble

alfalfa vs. lucerne

angelica vs. angelique

anise vs. aniseed

acetum vs. vinegar

albumen vs. white

albumen vs. albumin

alcohol vs. intoxicant

akvavit vs. aquavit

arak vs. arrack

absinth vs. absinthe

aestivation vs. estivation

authorities vs. government

armorer vs. armourer

armorer vs. artificer

academe vs. academia

alinement vs. coalition

ally vs. friend

autarchy vs. autarky

aristocracy vs. gentry

aristocracy vs. nobility

ambiance vs. ambience

apex vs. peak

apogee vs. culmination

apolune vs. aposelene

anomalousness vs. anomaly

acme vs. peak

acme vs. elevation

abysm vs. abyss

anthill vs. formicary

alluvion vs. flood

alcoholism vs. dipsomania

alcoholism vs. drunkenness

ammonite vs. ammonoid

acclivity vs. raise

antielectron vs. positron

avatar vs. embodiment

angel vs. backer

angel vs. saint

aeon vs. eon

adventurer vs. venturer

adventurer vs. explorer

attender vs. auditor

attender vs. hearer

attender vs. listener

abbess vs. prioress

actor vs. thespian

actor vs. worker

abbot vs. archimandrite

abominator vs. loather

aggressor vs. attacker

aggressor vs. assailant

aggressor vs. assaulter

abbreviator vs. abridger

agitator vs. fomenter

abstracter vs. abstractor

addict vs. nut

addict vs. hook

abetter vs. abettor

agriculturist vs. cultivator

agriculturalist vs. cultivator

abolitionist vs. emancipationist

aircraftman vs. aircraftsman

adjuster vs. adjustor

abseiler vs. rappeller

administrator vs. executive

abuser vs. maltreater

admirer vs. adorer

admirer vs. champion

alky vs. souse

admonisher vs. monitor

academician vs. schoolman

adulterer vs. fornicator

alienee vs. grantee

adulteress vs. jade

accompanist vs. accompanyist

accomplice vs. confederate

accountant vs. controller

allocator vs. distributor

adversary vs. opponent

alphabetiser vs. alphabetizer

adviser vs. advisor

adviser vs. consultant

advocate vs. exponent

advocate vs. counsel

advocate vs. preach

advocate vs. urge

advocator vs. exponent

achiever vs. success

apprehender vs. knower

aquanaut vs. oceanaut

assassin vs. bravo

assassinator vs. bravo

apprentice vs. learner

apprentice vs. prentice

asserter vs. declarer

affirmer vs. asserter

asserter vs. asseverator

asserter vs. avower

appraiser vs. valuator

appraiser vs. authenticator

analyst vs. psychoanalyst

arbiter vs. arbitrator

arbiter vs. umpire

arbitrager vs. arbitrageur

arb vs. arbitrageur

anarchist vs. nihilist

anarchist vs. syndicalist

astrologer vs. astrologist

archaeologist vs. archeologist

astronaut vs. spaceman

astronaut vs. cosmonaut

ancestress vs. foremother

anchorman vs. anchorperson

archer vs. bowman

anecdotist vs. raconteur

astronomer vs. stargazer

architect vs. designer

anesthesiologist vs. anesthetist

anaesthetist vs. anesthesiologist

archpriest vs. primate

atavist vs. throwback

athlete vs. jock

anglophil vs. anglophile

attestant vs. attester

animator vs. energizer

attestant vs. witness

aristocrat vs. patrician

augur vs. auspex

augur vs. forecast

aunt vs. auntie

aunt vs. aunty

artificer vs. craftsman

artificer vs. artisan

artificer vs. journeyman

artificer vs. discoverer

artificer vs. inventor

arranger vs. organizer

authoriser vs. authorizer

apologist vs. justifier

arsonist vs. firebug

avenger vs. retaliator

aviator vs. flier

aeronaut vs. flier

alumna vs. alumnus

alumnus vs. grad

alumnus vs. graduate

artilleryman vs. cannoneer

artilleryman vs. gunner