Distinguish between constitution and constitutionalism

Constitution
can be defined as a set of rules that shows how
a country should be administered. They
are basic laws for
governing a given state. It defines
the power of the government
and rights of the citizen. 
Constitutionalism simply means rule according
to -the constitution i.e government should
administer the state according to the provisions of
the constitution. This principle is fostered by
the existence of a virile and fearless press and independent judicial system.

The main
features of a constitution are: 

• It must have a preamble that entails the
  general declaration of the citizens about the
  constitution. 
• A constitution must also show the
  structure of thegovernment, it must explain the composition
  of the executive, legislature and judiciary. 
• A constitution must also-contain the
  procedure of amendment, it must show whether it can be
  changed through the ordinary parliamentary procedure or
  otherwise.
•  A constitution must also embody the
  fundamental human rights like freedom of speech, freedom of
  assembly, Rights to life, freedom of religion
  and association. 
• The fundamental principles and objectives of state policy must also be contained in the constitution.