bilateral
correlative
interactional
interactive
reciprocative
reciprocatory
shared
trilateral
accessory
accompanying
associated
attendant
attending
changeable
coacting
coactive
coadjutant
coadjuvant
coefficient
coincident
collaborative
collateral
collective
collectivist
collectivistic
collusive
combined
commensal
common
communal
communalist
communalistic
communist
communistic
communitarian
commutable
commutative
commutual
complementary
concerted
concomitant
concordant
concurrent
concurring
conjoint
conjunct
connected
conniving
convertible
cooperant
cooperating
cooperative
coupled
ecumenic
equal
constant
instinctive
personal
profound
universal
utmost
parimutuel
individual