● Mosts
● Nearly
● Almost
● Virtually
● About
● Nigh
● All but
● Near
● Just about
● To the highest degree
● Well-nigh
● -ed
● -most
● 3rd
● Aarau
● Abacus
● Abc
● Abdomen
● Abdominal breathing
● Abdullah
● Abe
● Abed
● Abject
● Able
● Ablest
● Above
● Absolutely
● Absorbing
● Abstinence
● Absurd
● Acanthopterygian
● Accessible
● Accidental
● Acclaimed
● Accountable
● Accra
● Accrual accounting
● Accurate
● Accuse
● Ace
● Achondroplasia
● Acknowledging
● Acne
● Acne vulgaris
● Acquirement
● Acraspeda
● Acroclinium
● Act
● Actin
● Actinium
● Actinomycosis
● Action
● Active
● Actor
● Actually
● Acura
● Acute
● Acute lymphoblastic leukemia
● Acute lymphocytic leukemia
● Acute myelocytic leukemia
● Acute myeloid leukemia
● Acutely
● Acy
● Adamantly
● Adana
● Addison
● Addition
● Additionally
● Adduce
● Adducing
● Adequate
● Adhesion
● Adieu
● Adjunct
● Adjure
● Admirable
● Admiral
● Admittedly
● Adrenal
● Adult
● Adultery
● Advanced
● Advantage
● Adversary
● Adverse
● Adversely
● Advisable
● Adytum
● Aedes
● Aerosol
● Aestheticism
● Affected
● Afflicted
● Africanized bee
● Africanized honey bee
● Afrikaans
● Aftermath
● Aftermost
● Agamemnon
● Agarose