pal vs brother

pal and brother both are nouns.

Word	Noun	Adjective	Verb	Adverb
pal	Yes	No	Yes	No
brother	Yes	No	No	No

As nouns, pal and brother are synonyms defined as:

pal and brother: a close friend who accompanies his buddies in their activities

Other synonyms of pal include buddy, chum, crony, sidekick.

pal (noun)	brother (noun)
a close friend who accompanies his buddies in their activities	a male with the same parents as someone else
	a male person who is a fellow member (of a fraternity or religion or other group)
	a close friend who accompanies his buddies in their activities
	used as a term of address for those male persons engaged in the same movement

pal (verb)	brother (verb)
become friends; act friendly towards