English definition

Soldier:  

WordReference= 

• one who works or has worked in military service.
• an enlisted person, as distinguished from a commissioned officer.
• a low-ranking member of a crime organization.
• a member of certain insect groups whose job is to defend the colony from invaders.

Longman=

a member of the army of a country especially someone who is not an officer  

Warrior:

WordReference= 

• a person engaged or experienced in warfare;  soldier.
• a person who shows or has shown great vigor, courage, or aggressiveness, as in politics or athletics.

Longman=

a soldier or fighter who is brave and experienced – used about people in the past