equal
Doppelganger
accordant
actual thing
affirmative
agent
agnate
agreeable
agreeing
akin
alike
all one
all the same
ally
alter ego
alternate
alternative
analogon
analogous
analogue
analogy
answerable
answering
associate
at one
backup
balance
ballast
brother
carbon copy
change
changeable
changeling
close
close copy
close match
coequal
coexistent
coexisting
coextensive
cognate
coherent
coincident
coincidental
coinciding
commensurate
commutable
commutative
companion
atomic mass
atomic weight
relative atomic mass
analysis
component
control
counterpart
distribution
output
resource
source
standard
value
version
weight
ambivalent