- absolute majority
- absolute pitch
- absolute scale
- absolute space
- absolute temperature
- absolute threshold
- absolute value
- absolute viscosity
- absolute zero
- absolutely
- absoluteness
- absolution
- absolutism
- absolutist
- absolutistic
- absolve
- absolved
- absolver
- absolvitory
- absorb
- absorbable
- absorbance
- absorbate
- absorbed
- absorbefacient
- absorbency
- absorbent
- absorbent cotton
- absorbent material
- absorber
- absorbing
- absorptance
- absorption
- absorption band
- absorption coefficient
- absorption factor
- absorption indicator
- absorption spectrum
- absorption unit
- absorptive
- absorptivity
- absquatulate
- abstain
- abstainer
- abstemious
- abstemiously
- abstemiousness
- abstention
- abstentious
- abstinence
- abstinent
- abstract
- abstract art
- abstract artist
- abstract entity
- abstract expressionism
- abstract thought
- abstracted
- abstractedly
- abstractedness
- abstracter
- abstraction
- abstractionism
- abstractionist
- abstractive
- abstractly
- abstractness
- abstractor
- abstruse
- abstrusely
- abstruseness
- abstrusity
- absurd
- absurdity
- absurdly
- absurdness
- abu ali al-husain ibn abdallah ibn sina
- abu dhabi
- abu hafs al-masri brigades
- abu nidal organization
- abu sayyaf
- abudefduf
- abudefduf saxatilis
- abuja
- abukir
- abukir bay
- abulia
- abulic
- abul-walid mohammed ibn-ahmad ibn-mohammed ibn-roshd
- abundance
- abundant
- abundantly
- abuse
- abused
- abuser
- abusive
- abusively
- abut
- abutilon
- abutilon theophrasti
- abutment
- abutment arch
- abutter
- abuzz
- abvolt
- abwatt
- aby
- aby moritz warburg
- aby warburg
- abydos
- abye
- abyla
- abysm
- abysmal
- abysmally
- abyss
- abyssal
- abyssal zone
- abyssinia
- abyssinian
- abyssinian banana
- abyssinian cat
- ac
- acacia
- acacia auriculiformis
- acacia cambegei
- acacia catechu
- acacia dealbata
- acacia farnesiana
- acacia melanoxylon
- acacia pycnantha
- acacia xanthophloea
- academe
- academia
- academic
- academic administrator
- academic costume
- academic degree
- academic department
- academic freedom
- academic gown
- academic program
- academic relation
- academic requirement
- academic robe
- academic session
- academic term
- academic year
- academically
- academician
- academicianship
- academicism
- academism
- academy
- academy award
- academy of motion picture arts and sciences
- academy of television arts and sciences
- acadia
- acadia national park
- acadian
- acalypha
- acalypha virginica
- acantha
- acanthaceae
- acanthion
- acanthisitta
- acanthisitta chloris
- acanthisittidae
- acanthocephala
- acanthocephalan
- acanthocereus
- acanthocereus pentagonus
- acanthocereus tetragonus
- acanthocybium
- acanthocybium solandri
- acanthocyte
- acanthocytosis
- acanthoid
- acantholysis
- acanthoma
- acanthophis
- acanthophis antarcticus
- acanthopterygian
- acanthopterygii
- acanthoscelides
- acanthoscelides obtectus
- acanthosis
- acanthosis nigricans
- acanthotic
- acanthous
- acanthuridae
- acanthurus
- acanthurus chirurgus
- acanthus
- acanthus family
- acanthus mollis
- acapnia
- acapnial
- acapnic
- acapnotic