- appal12
- apparitional20
- appeal13
- appositional20
- appraisal16
- approval19
- apsidal12
- apteral11
- aptitudinal18
- aquacultural29
- aquarial19
- arbitral12
- arbitrational18
- arboreal12
- arboricultural24
- archaeal14
- archaeological26
- archducal20
- archegonial20
- archeological25
- archesporial21
- archetypal21
- archetypical26
- archidiaconal24
- archiepiscopal29
- architectural23
- archival18
- areal6
- argal8
- argental12
- arithmetical21
- armigeral15
- armorial12
- arousal9
- arrayal10
- arrhizal20
- arrival12
- arsenal9
- arsenical14
- artal6
- arterial9
- artifactual19
- artificial17
- artisanal11
- arval10
- ascensional17
- ascetical16
- asexual16
- asocial11
- aspectual17
- aspherical19
- aspirational17
- associational18
- assonantal13
- asternal10
- asteroidal12
- astragal11
- astral7
- astrological19
- astronautical19
- astronomical20
- astrophysical24
- asymmetrical24
- atabal10
- atemporal16
- atheistical17
- atheoretical18
- atomical15
- atonal8
- atrial7
- attentional14
- attitudinal15
- attributional19
- attritional13
- atypical17
- auctorial14
- audial9
- audiological21
- audiovisual19
- augural12
- aural7
- auroral9
- austral9
- autarchical21
- autarkical19
- autecological24
- authorial13
- autobiographical31
- autocratical20
- autosomal14
- autumnal15
- avifaunal19
- avocational20
- avowal14
- axal12
- axial13
- axiological25
- axisymmetrical33
- axonal15
- axonemal20
- azimuthal25
- azonal17
- baal8
- bacchanal22
- backpedal24
- bacterial16
- bactericidal23
- bacteriological28
- bal7
- balmoral16
- balneal13
- banal10
- baptismal19
- barbal13
- barbital15
- baritonal14
- baronial13
- basal9
- basidial13
- basinal12
- basipetal16
- bathyal15
- bathymetrical27
- behavioral20
- beneficial21
- benthal14
- benzal20
- bequeathal26
- berascal15
- bestial11
- bestowal15
- betrayal14
- betrothal15
- bharal12
- biannual15
- biaxal17
- biaxial18
- biblical19
- bibliographical33
- bibliomaniacal29
- bibliothecal25
- bicameral19
- bicaudal17
- bicentennial22
- bicipital19
- bicoastal16
- biconditional23
- bicultural20
- bidental14
- bidialectal20
- bidirectional22
- biennial14
- bifacial18
- bifocal17
- bifunctional25
- bigeminal19
- bilabial16
- bilateral14
- bilharzial26
- bilingual18
- bimanual17
- bimensal16
- bimetal14
- bimillennial23
- bimodal15
- binal10
- binational16
- binaural14
- binomial16
- biochemical26
- biocidal16
- bioelectrical24
- bioethical19
- biogeochemical31
- biogeographical31
- biographical26
- biological20
- biomaterial18
- biomathematical30
- biomechanical29
- biomedical21
- biometeorological30
- biometrical21
- biophysical25
- bioregional18
- biosocial16
- biostatistical21
- biotechnical25
- biotechnological32
- biotical15
- biparental18
- bipedal15
- bipyramidal24
- biracial15
- biradial13
- bisectional19
- bisexual20
- bizonal21
- blastemal17
- bonemeal16