skunk at a garden party
ignoree
shrinking violet
seclude
nonexclusion
sequester
periphractic
withdraw
exclusionarily
sequestrate
foreigner
entirely
cog
outsider
exclusionism
welcomeless
piggy in the middle
personlessness
discontinuer
on the outside, looking in
exclus
invisible
excludedness
absent
alienated
deindividuation
disqualification
bit player
excludee
aberrant
pococurantist
loner
ape
enemy
lone hand
backwoodsman
noli me tangere
lone wolf
nonavoidance
outsiderish
excludability
single-handed
isolatee
outsiderly
fream
unintelligentsia
nucleus
odds and sods
out of it
core
support bubble
reluctant dragon
from
core group
non-involvement
pay no mind
exclusionistic
unspecificness
unwished-for
exclusive
nonparticipation
exclusory
non-engagement
leper
antisocial
unsubscriber
heteronymy
reindeer games
unalive
omittability
civilian
unwashed masses
asocial
omissibility
rogue's gallery
galere
closure
ostracism
moony
truant
empty chair
unsympathizer
the cobbler's children are the worst shod
Muggle
excusable
segregated
the shoemaker's children go barefoot
nonsympathizer
buttinsky
avoider
weak sister
out of line
absenteeism
ignorer
nonpeer
omissively
nonentity
sideman