- abeam11
- abloom13
- abohm13
- abolitionism20
- abomasum18
- absenteeism18
- absolutism18
- abstractionism24
- absurdism17
- abysm13
- academicism24
- academism19
- acclaim17
- accustom18
- acetabulum22
- acetum13
- achromatism22
- aciculum20
- aciform16
- aconitum16
- acronym16
- acrotism14
- actinism15
- actinium16
- activism18
- addendum16
- adeem9
- adoptianism19
- adoptionism19
- adventurism21
- adytum13
- aecidium16
- aecium13
- aeriform14
- aerobium15
- aeroembolism22
- aerogram13
- aestheticism20
- affirm15
- ageism11
- agendum15
- ageratum14
- agism10
- agleam12
- agnosticism20
- agrarianism17
- ahem9
- aim6
- airstream12
- alarm9
- alarmism15
- alarum11
- albinism16
- album13
- alburnum18
- alcoholism20
- aldosteronism19
- algorism14
- algorithm17
- algum12
- alienism13
- aliform14
- allelism14
- allelomorphism28
- allium12
- allodium15
- allomorphism25
- allonym15
- alluvium19
- alodium13
- alpinism16
- altruism13
- alum9
- aluminium19
- aluminum18
- alyssum14
- am5
- amalgam16
- amateurism17
- ambulacrum25
- americium19
- ammonium19
- amoralism16
- amylum16
- anabaptism20
- anabolism17
- anachronism21
- anadem11
- anagram13
- analphabetism26
- anarchism18
- androecium19
- anecdotalism21
- aneurism13
- aneurysm15
- angiogram17
- angiosperm19
- angleworm19
- anglicism19
- angstrom14
- animalculum25
- animalism17
- animism14
- anisotropism19
- anonym13
- antagonism17
- antebellum20
- antemortem17
- antependium21
- anteroom12
- anthem12
- antheridium19
- anthodium17
- anthropocentrism29
- anthropomorphism33
- anthropopathism29
- anthurium17
- antialcoholism25
- antiatom12
- antiauthoritarianism28
- antiblackism27
- anticapitalism25
- anticlericalism27
- anticolonialism25
- anticommercialism34
- anticommunism28
- antielitism16
- antievolutionism27
- antifascism21
- antifeminism23
- antiferromagnetism31
- antifoam15
- antihumanism23
- antijam20
- antiliberalism23
- antilogarithm22
- antimaterialism23
- antimilitarism22
- antinepotism20
- antinomianism22
- antiquarianism29
- antiracism17
- antiradicalism23
- antirationalism21
- antirealism16
- antireductionism26
- antireform17
- antiritualism19
- antiromanticism26
- antirrhinum19
- antiserum14
- antiterrorism17
- antonym14
- antrum11
- aphorism16
- apocalypticism32
- apocalyptism27
- apophthegm25
- apothecium22
- apothegm18
- apothem15
- appressorium22
- apterium15
- aquarium22
- arboretum16
- arcanum15
- archaebacterium30
- archaism16
- archdukedom26
- archegonium23
- archesporium24
- arciform17
- argentum15
- argumentum21
- arm6
- armamentarium24
- armyworm19
- arrowworm18
- arteriogram16
- arum8
- asarum10
- asceticism19
- ascidium16
- ascogonium20
- ashram11
- aspergillum22
- asphaltum19
- assimilationism23
- associationism21
- asterism11
- astigmatism19
- aswarm12
- asylum13
- asynchronism24
- atavism14
- atheism12
- athenaeum16
- atheneum15
- athleticism20
- atom7