principal

nouns

the original amount of a debt on which interest is calculated
principal
is a part of
the temporary provision of money (usually at interest)
loan
is a type of (narrower)
money or goods or services owed by one person to another
debt
the educator who has executive authority for a school
"she sent unruly pupils to see the principal"
head, head teacher, principal, school principal
is derived from
principalship
an actor who plays a principal role
lead, principal, star
capital as contrasted with the income derived from it
corpus, principal, principal sum
(criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement
principal
domain category
the body of law dealing with crimes and their punishment
criminal law
is a type of (narrower)
a person who transgresses moral or civil law
offender, wrongdoer
the major party to a financial transaction at a stock exchange; buys and sells for his own account
dealer, principal

adjectives

most important element
"the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch"
chief, main, master, primary, principal