ranger vs commando

ranger and commando both are nouns.

Word	Noun	Adjective	Verb	Adverb
ranger	Yes	No	No	No
commando	Yes	No	No	No

As nouns, ranger and commando are synonyms defined as:

ranger and commando: a member of a military unit trained as shock troops for hit-and-run raids

ranger (noun)	commando (noun)
an official who is responsible for managing and protecting an area of forest	an amphibious military unit trained for raids into enemy territory
a member of a military unit trained as shock troops for hit-and-run raids	a member of a military unit trained as shock troops for hit-and-run raids