Janus
abscission
ambiguity
ambivalence
amputation
bifidity
biformity
bifurcation
bipartition
bisection
branching
butchering
by two
chopping
cleavage
conjugation
cutting
cutting in two
dimidiation
division
doubleness
doublethink
doubling
dualism
duality
duplexity
duplication
duplicity
enucleation
equivocality
excision
fission
forking
halving
in half
irony
laceration
mutilation
pairing
polarity
ramification
rending
resection
ripping
scission
section
severance
slashing
slicing
categorisation
categorization
classification
partition
trichotomy
agreeth
bisect
demarcation
gateaux
possessiveness
typology