Long Words That Start With A: An Impressive List

In this article, you will discover a list of impressively long words that start with the letter “A.

1. Antagonistic- Hostile; opposed.
2. Abbreviation- A shortened form of a word.
3. Abstemiously- With moderation or self-restraint.
4. Aristocratically- Relating to a ruling class.
5. Anthropological- Study of humans.
6. Amortization- Gradual write-off of a cost.
7. Acclimatization- Process of adapting to a new climate.
8. Appropriateness- Suitability.
9. Accountability- Responsibility.
10. Apportionment- Distribution of shares.
11. Authentication- Confirming the truth of something.
12. Altruistically- Selflessly concerned for others’ well-being.
13. Acknowledgeable- Recognizable or acceptable as true.
14. Articulation- Clear and precise pronunciation.
15. Authoritarianism- Enforcing strict obedience.
16. Agglomeration- Collection into a mass.
17. Anthropocentric- Regarding humans as central.
18. Accreditations- Certifications or recognitions.
19. Authoritative- Commanding respect.
20. Acquaintanceship- Familiarity.
21. Assimilationist- Advocate of integration.
22. Ambitiousness- Having a strong desire for success.
23. Accelerometers- Devices measuring acceleration.
24. Appreciatively- Showing gratitude.
25. Abbreviationist- One who uses abbreviations excessively.
26. Aestheticism- Devotion to beauty.
27. Associationism – Theory that mental processes operate by the association of ideas.
28. Acousticophobia- Fear of noise.
29. Achievement- Successful accomplishment.
30. Adaptability- Ability to adjust.
31. Ameliorating- Making better.
32. Accountabilities – Plural of accountability.
33. Assurability- Capability of being assured.
34. Adventurous- Willing to take risks.
35. Annexationist- Advocate for annexing territories.
36. Atmospheric- Relating to the atmosphere.
37. Arbitrational- Relating to arbitration or settlement.
38. Avuncularly- In an uncle-like manner.
39. Accommodation- Lodging or adapting.
40. Anthropophagi- Cannibals.
41. Adjudications- Judicial decisions or rulings.
42. Amphitheaters- Outdoor circular theaters.
43. Accumulatively- Increasingly gathering.
44. Appreciation- Recognition of value.
45. Acknowledgments- Recognitions of truth.
46. Asymptomatic- Showing no symptoms.
47. Assertiveness- Confidence without aggression.
48. Adventurously- Willingly taking risks.
49. Anesthesiology- Study of anesthesia.
50. Alternate- Available as another choice.
51. Approximations- Almost accurate estimates.
52. Artificialities- Artificial qualities.
53. Abhorrently- In a disgusting manner.
54. Avocatization- Process of providing legal advice.
55. Artificialization- Process of making artificial.
56. Anthropography- Description of humanity.
57. Anesthetically- In a pain-relieving manner.
58. Augmentatively- Increasingly adding.
59. Acceleratedly- In a quick manner.
60. Acupuncturist- Practitioner of acupuncture.
61. Archaeological- Relating to archaeology.
62. Autobiographical- Relating to one’s own life story.
63. Accommodational- Relating to making accommodations.
64. Affectability- Capability of being affected.
65. Allotropically- In different physical forms.
66. Argumentative- Given to arguing.
67. Architectural- Relating to architecture.
68. Assemblage- A gathering.
69. Antihistamines- Allergy relief drugs.
70. Authenticated- Verified as true.
71. Affordable- Reasonably priced.
72. Antibacterial- Preventing bacteria growth.
73. Abhorrence- Extreme dislike.
74. Aggressiveness- Tendency to attack.
75. Accommodationist- Advocate of compromise.
76. Allocationally- Relating to allocation.
77. Ameliorative- Improving.
78. Accomplishment- Achievement.
79. Anthropomorphically- Attributing human traits to non-humans.
80. Administrative- Related to management.
81. Accountability- Taking responsibility.
82. Amelioratively- In an improving manner.
83. Accelerando- Gradually increasing in speed.
84. Anesthetizations- Processes of administering anesthesia.
85. Ambidextrously- Using both hands equally well.
86. Accelerometer- Device measuring acceleration.
87. Accupunctural- Relating to acupuncture.
88. Approval- Acceptance.
89. Associationally- Pertaining to associations.
90. Algorithmically- According to an algorithm.
91. Anticlimactic- Disappointingly trivial.
92. Alarming- Causing fear.
93. Analogously- Comparatively.
94. Abortiveness- Unsuccessful; failure.
95. Antibillboardism- Opposition to billboards.
96. Achievements- Accomplishments.
97. Aerodynamics- Study of air motion.
98. Analyzability- Capability of being analyzed.
99. Acculturated- Adopted cultural traits.
100. Angelically- In an angel-like manner.