pair
one-to-one
twosome
duo
couple
duet
acquaintanceship
dyad
pair off
item
two-time
lesbro
buddyroo
mutual friends
friend with benefits
thing
alter ego
cuddle buddy
acegirl
cuzzy
queen
stead
romance
love affair
crony
bosom friend
intimate
kith
baby
ace boon coon
Tweedledum and Tweedledee
bosom buddy
taken
cognation
interpersonal
shag
cove
interassociate
pal
galpal
chumship
philia
palship
sociation
Ernie and Bert
multirelational
bosom
fettler
relo
intimacy
cut buddy
familiarity
closeness
intrarelationship
mate
wingwoman
pickup
mutual
lovebird
girlfriend
more than friends
befriender
noncouple
bind
lady friend
double
squeeze
girl
frenemyship
mutual friend
companion
smitten kitten
nigga
boo
sistren
marrow
marra
fren
old friend
kith and kin
passionate friendship
chemistry
sister from another mister
MU
blind date
cheek by jowl
divide
comrade
friendlihood
friendshiplike
just friends
demophile
pardner
battle of the sexes
in tandem
2gether