collateral (n.)
- accessory
- accident
- accidental
- addendum
- addition
- adjunct
- affiliate
- agnate
- akin
- an
- ancestry
- appendage
- appurtenance
- associate
- attendant
- attending
- auxiliary
- blood
- bound
- caution
- clansman
- coeval
- cognate
- coming
- concomitant
- congeneric
- conjugate
- contemporary
- contingency
- contingent
- correlative
- debris
- deposit
- enate
- equal
- even
- extra
- family
- fellow
- final
- flesh
- folks
- forfeit
- foster
- garbage
- german
- happenstance
- incidental
- inessential
- joint
- junk
- kelter
- kin
- kindred
- kinfolk
- kinsfolk
- kinsman
- kinswoman
- last
- litter
- margin
- more
- new
- nonessential
- offal
- other
- parallel
- people
- plus
- posterity
- relations
- riffraff
- rubbish
- secondary
- sib
- sibling
- spare
- stake
- subsidiary
- supernumerary
- supplement
- surplus
- tribesman
- twin
- ultimate
- unison
- wed
collateral (adj.)
- accessory
- accidental
- accompanying
- additional
- adjunct
- adscititious
- adventitious
- affiliated
- agnate
- akin
- aligned
- allied
- an
- analogous
- ancillary
- another
- appurtenant
- associate
- attendant
- auxiliary
- avuncular
- blood
- bound
- casual
- circumstantial
- coetaneous
- coeval
- coexistent
- coexisting
- coextensive
- cognate
- coincident
- combined
- coming
- concomitant
- concurrent
- congeneric
- conjoint
- conjugate
- connected
- consanguine
- consanguineous
- contemporaneous
- contemporary
- conterminous
- contingent
- contributory
- correlated
- correlative
- coterminous
- coupled
- enate
- equal
- equidistant
- even
- eventual
- extra
- farther
- fellow
- final
- flesh
- forfeit
- fortuitous
- foster
- fresh
- further
- german
- germane
- implicated
- incidental
- indirect
- inessential
- interrelated
- involved
- isochronal
- isochronous
- joined
- joint
- kelter
- kin
- kindred
- knotted
- last
- linked
- litter
- matrilineal
- more
- mutual
- new
- nonconvergent
- nonessential
- other
- paired
- parallel
- patrilineal
- plus
- related
- secondary
- simultaneous
- spare
- subsidiary
- superfluous
- supernumerary
- supplemental
- supplementary
- surplus
- tied
- twin
- twinned
- ulterior
- ultimate
- unessential
- uterine
- wed
- wedded
