patrol vs police

patrol and police both are nouns.

Word	Noun	Adjective	Verb	Adverb
patrol	Yes	No	Yes	No
police	Yes	No	Yes	No

As verbs, patrol and police are synonyms defined as:

patrol (noun)	police (noun)
the activity of going around or through an area at regular intervals for security purposes	the force of policemen and officers
a detachment used for security or reconnaissance
a group that goes through a region at regular intervals for the purpose of security

patrol (verb)	police (verb)
maintain the security of by carrying out a patrol	maintain the security of by carrying out a patrol