archaea

archaeal

archaean

archaeans

archaebacteria

archaebacterium

archaeological

archaeologies

archaeologist

archaeologists

archaeology

archaeon

archaeopteryx

archaeopteryxes

archaic

archaically

archaise

archaised

archaises

archaising

archaism

archaisms

archaist

archaistic

archaists

archaize

archaized

archaizes

archaizing

archangel

archangelic

archangels

barchan

barchans

diarchal

dyarchal

exarchal

exarchate

exarchates

gearchange

gearchanges

hierarchal

matriarchal

matriarchate

matriarchates

monarchal

patriarchal

patriarchate

patriarchates

researchable