A is our fearless leader of the alphabet. We would have no A-B-Cs without A to lead the team! Keep on reading to impress your family and friends with some amazing words that begin with this lovable letter.
Abase
(v) to feel shame
Abdominous
(adj) a person with a large belly; fat
Abject
(adj) very unfortunate, bad, or miserable
Abstain
(adj) existing in thought or as an idea
Abundant
(adj) plentiful; existing in large quantities
Acarology
(n) the study of mites
Acciaccatura
(n) a very short note that is played before a longer one
Accipiter
(n) a bandage worn around the nose
Acclimate
(v) become accustomed to a new climate/condition
Accoucheur
(n) male midwife
Accoucheuse
(n) female midwife
Accort
(v) to entertain
Accoy
(v) to subdue; to soothe
Acerbate
(v) to irritate
Acerous
(adj) having no horns; having no horns; having no tentacles
Achaenocarp
(n) any dry indehiscent fruit
Acidulous
(adj) sharp or bitter-tasting
Aciniform
(adj) shaped like a berry
Ackamarackus
(n) something regarded as pretentious nonsense; humbug
Acouasm
(n) a nonverbal auditory, a ringing or a hissing
Aritochromacy
(n) color-blindness
Acronical
(adj) occuring at nightfall or sunset
Adelaster
(n) a name for a plant which has not had its flowers botanically examined
Adenalgia
(n) pain in a gland
Adiaphoresis
(n) absence or reduction of perspiration
Advesperate
(v) darken; or to become late
Advocaat
(n) liqueur containing rum and raw egg
Aerobe
(n) organism requiring oxygen to survive
Aerolith
(n) stone that falls from the sky; meteorite
Aerophore
(n) an instrument used to inflate stillborn child’s lungs
Affray
(n) an instance of fighting in a public place that disturbs the peace
Afterings
(n) the last milk drawn when milking a cow
Agelast
(n) one who never laughs
Agnail
(n) sore, corn, or hangnail on the toe or foot
Agouti
(n) a tropical rabbit-sized rodent
Agravic
(adj) pertaining to a state or region where the effect of gravity is zero
Agrize
(v) to horrify; to disfigure
Agromania
(n) intense desire to be in open spaces
Ailette
(n) a plate of armour worn on shoulder
Alb
(n) a long white robe worn by priests
Alcatote
(n) a silly or foolish person
Alethiology
(n) the study of truth
Algor
(n) coldness; a shivering fit
Amanous
(adj) lacking hands
Amoretto
(n) a cherub or spirit of love
Anacustic
(adj) totally deaf
Anbury
(n) soft fleshy tumor in horses
Anemology
(n) the study of winds
Antigropelos
(n) waterproof leggings
Apay
(v) to satisfy 
Source : http://thoughtcatalog.com/january-nelson/2018/06/words-that-start-with-a/