- alternating light
- alternating series
- alternating voltage
- alternating-gradient focusing
- alternation
- alternation of generations
- alternative
- alternative conjunction
- alternative curriculum
- alternative dispute resolution
- alternative energy
- alternative fuel
- alternative history
- alternative hypothesis
- alternative medicine
- alternative pathway
- alternative question
- alternative school
- alternative society
- alternatively
- alternator
- althaea
- althea
- altho
- althorn
- although
- alti-
- altigraph
- altiloquent
- altimeter
- altimetry
- altiplano
- altissimo
- altitude
- altitude chamber
- altitude dial
- altitude sickness
- altitudinal
- alto
- alto clef
- alto flute
- alto horn
- alto-
- alto-relievo
- altocumulus
- altogether
- altoist
- altostratus
- altrices
- altricial
- altruism
- altruist
- altruistic
- aludel
- alula
- alum
- alum.
- alumin-
- alumina
- alumina cement
- aluminate
- aluminiferous
- aluminite
- aluminium
- aluminium bronze
- aluminium hydroxide
- aluminium oxide
- aluminium sulphate
- aluminize
- alumino-
- aluminography
- aluminosilicate
- aluminothermy
- aluminous
- aluminous cement
- aluminum
- aluminum acetate
- aluminum ammonium sulfate
- aluminum borate
- aluminum borohydride
- aluminum brass
- aluminum bronze
- aluminum carbide
- aluminum chloride
- aluminum fluosilicate
- aluminum glycinate
- aluminum hydroxide
- aluminum monostearate
- aluminum nitrate
- aluminum oxide
- aluminum plant
- aluminum silicate
- aluminum soap
- aluminum sulfate
- alumna
- alumni
- alumnus
- alumnx
- alumroot
- alunite
- alunogen
- alure
- alutaceous
- alveated
- alveol-
- alveola
- alveolar
- alveolar arch
- alveolar ridge
- alveolate
- alveolo-
- alveolus
- alveopalatal
- alvine
- alway
- always
- alyssum
- am
- am-dram
- am/fm
- ama
- amadan
- amadavat
- amadoda
- amadou
- amah
- amain
- amakihi
- amakwerekwere
- amal.
- amalaka
- amalgagender
- amalgam
- amalgamate
- amalgamation
- amandine
- amandla
- amanita
- amantadine
- amanuensis
- amaranth
- amaranth family
- amaranthaceous
- amaranthine
- amarelle
- amaretti
- amaretto
- amaryllidaceous
- amaryllis
- amaryllis family
- amass
- amassed
- amate
- amateur
- amateur night
- amateurish
- amateurism
- amative
- amatol
- amatory
- amatungula
- amaurosis
- amaut
- amaze
- amazeballs
- amazed
- amazement
- amazing
- amazon
- amazon ant
- amazonite
- ambages
- ambagious
- ambarella
- ambary
- ambassador
- ambassador-at-large
- ambassadress
- ambatch
- ambeer
- amber
- amber fluid
- amber gambler
- amberfish
- ambergris
- amberina
- amberjack
- amberoid
- ambi-
- ambiance
- ambidentate
- ambidexter
- ambidexterity
- ambidextrous
- ambience
- ambient
- ambient air standard
- ambient music
- ambient noise
- ambient temperature
- ambiente
- ambigram
- ambiguity
- ambiguous
- ambilateral
- ambiophony
- ambipolar
- ambira
- ambisextrous
- ambisexual
- ambisinister
- ambisonics
- ambisyllabic
- ambit
- ambitendency
- ambition
- ambitious
- ambivalence
- ambivalent
- ambivalent sexism
- ambiversion
- ambivert
- amble
- amblygonite
- amblyopia
- amblyoscope
- amblypod
- ambo
- amboceptor
- ambon
- ambosexual
- amboyna
- ambrette
- ambrette seed
- ambrette-seed oil
- ambrettolide
- ambroid
- ambrosia
- ambrosia beetle
- ambrosial
- ambrotype
- ambry
- ambsace
- ambulacrum
- ambulance
- ambulance chaser
- ambulance stocks
- ambulant
- ambulante
- ambulate
- ambulation
- ambulatory
- ambulatory care
- ambulette
- ambuscade
- ambuscado
- ambush
- ambush bug
- ambush marketing
- ambystomid
- amdt.
- ameba
- amebiasis
- amebic
- amebic dysentery
- amebocyte
- ameboid
- ameer
- ameiosis
- amelia
- ameliorate
- ameliorated
- amelioration
- ameliorative
- ameloblast
- amelogenesis
- amen
- amen corner
- amenable
- amend
- amendatory
- amende honorable
- amended
- amending formula
- amendment
- amends
- amenity
- amenity bed
- amenorrhea
- amenorrhoea
- amensalism
- ament
- amentaceous
- amentia
- amentiferous
- amerce
- americium
- ameristic
- amesace
- ametabolic