Interpersonal relationship
strong, deep, or close association or acquaintance between two or more people
love triangle
brotherhood
rapport
romance
Internet relationship
long-distance relationship
psychological contract
fraternization
love marriage
intimacy
collegiality
affair
teacher-student relationship
relationship between Friedrich Nietzsche and Max Stirner
monogamy
sugar dating
Nikah mut‘ah
concubinage
shipping
platonic love
pederasty
living apart together
on-again, off-again relationship
affectional bond
hanky-panky
Civil solidarity pact
sexual relationship
friend with benefits
patronage
common-law marriage in Quebec
fuck buddy
same-sex relationship
civil naming ceremony
therapeutic relationship
non-monogamy
domestic partnership
courtship
Boston marriage
paternity
friendship
business relation
enmity
fraternity
client-social worker relationship
intimate relationship
Workplace relationships