- Archean Adj Noun
- Arched Adj
- Archegonial Adj
- Archeographic Adj
- Archeological Adj
- Archeozoic Adj
- Archetypal Adj
- Archetypic Adj
- Archetypical Adj
- Archibenthic Adj
- Archidiaconal Adj
- Archiepiscopal Adj
- Archimedean Adj
- Arching Adj
- Archipelagic Adj
- Architectonic Adj
- Architectural Adj
- Archival Adj
- Archived Adj
- Arciform Adj
- Arcless Adj
- Arclike Adj
- Arctic Adj
- Arcticized Adj
- Arcual Adj
- Arcuate Adj
- Arcuated Adj
- Ardent Adj
- Arduous Adj
- Areactive Adj
- Areal Adj
- Areawide Adj
- Areligious Adj
- Arenaceous Adj
- Arenarious Adj
- Arenicolous Adj
- Arenose Adj
- Areocentric Adj
- Areographic Adj
- Areoid Adj Noun
- Areolar Adj
- Areometric Adj
- Argent Adj Noun
- Argentaffin Adj Noun
- Argentaffine Adj
- Argental Adj
- Argentic Adj
- Argentiferous Adj
- Argentine Adj Noun
- Argentinian Adj Noun
- Argentophilic Adj
- Argentous Adj
- Argillaceous Adj
- Argillic Adj
- Argilliferous Adj
- Argilloferruginous Adj
- Argininosuccinic Adj
- Argive Adj Noun
- Argotic Adj
- Arguable Adj