What is a 16 letter word?

Answer 1

There are thousands of English sixteen-letter words. Here are some that begin with A:

absentmindedness, abstemiousnesses, abstractednesses, acanthocephalans, acceptablenesses, accessiblenesses, accidentalnesses, acclimatizations, accommodationist, accountabilities, accumulativeness, accustomednesses, acetophenetidins, acetylsalicylate, acknowledgements, acquaintanceship, addressabilities, adenocarcinomata, adenohypophyseal, adenohypophysial, administratively, administratrices, adrenalectomized, advantageousness, aeroelasticities, affectlessnesses, aggressivenesses, agriculturalists, allopolyploidies, alphabetizations, alphanumerically, aluminosilicates, amateurishnesses, aminotransferase, amphibiousnesses, anagrammatically, anaphylactically, anesthesiologies, anesthesiologist, antagonistically, antepenultimates, anthropocentrism, anthropomorphism, anthropomorphist, anthropomorphize, anthropopathisms, antiabortionists, antiaphrodisiacs, antiaristocratic, antiassimilation, antibureaucratic, anticarcinogenic, anticholinergics, anticlericalisms, anticolonialisms, anticolonialists, anticonglomerate, anticonservation, anticonventional, antievolutionary, antievolutionism, antievolutionist, antiferromagnets, antiforeclosures, antihierarchical, antihumanitarian, antihypertensive, antilibertarians, antimaterialisms, antimaterialists, antimetaphysical, antinationalists, antiorganization, antipathetically, antipornographic, antiprofiteering, antiprostitution, antiracketeering, antirationalisms, antirationalists, antirecessionary, antireductionism, antireductionist, antiromanticisms, antisegregations, antispeculations, antistrophically, antitotalitarian, antituberculosis, antiunemployment, antiuniversities, antivivisections, apocryphalnesses, appendicectomies, appreciativeness, apprehensiveness, archaeoastronomy, archaeologically, archconservative, archiepiscopally, archiepiscopates, aristocratically, arterioscleroses, arteriosclerosis, arteriosclerotic, articulatenesses, artificialnesses, assaultivenesses, assimilabilities, assimilationisms, assimilationists, associationistic, astrophotographs, astrophotography, asymptomatically, atrioventricular, attractivenesses, auspiciousnesses, authoritarianism, autobiographical, autocorrelations, autoimmunization, autointoxication, autopolyploidies, autoradiographic, autotransformers, autotransfusions, avariciousnesses