ace
amigo
associate
bedfellow
bedmate
birthmate
bosom buddy
buddy
bunkie
bunkmate
butty
camarade
chamberfellow
chum
classmate
clubmate
colleague
comate
companion
company
compeer
comrade
concubine
confrere
consociate
consort
copartner
copemate
copesmate
couchmate
cradlemate
crony
cupmate
doxy
fellow
fellow student
friend
general partner
girl friend
gossip
jailmate
kept mistress
kept woman
mate
messmate
mistress
old crony
pal
paramour
familiar
adviser
benefactor
brother-in-law
confidant
counsellor
guardian
helper
helpmate
kinsman
mentor
niece
playfellow
plaything
prank
protector
schoolmate
spouse
sweetheart
tutor