defense
method of protecting oneself
domestic
referring to something at home, not foreign
insure
ensure, to make sure
justice
a system of establishing what is legal and illegal by fair rules
ordain
to establish something by law
posterity
future generations
Preamble
the introduction to the U.S. Constitution
tranquility
peace
union
something formed by combining parts, such as states into one country
welfare
well-being