commando vs SAS

commando and SAS both are nouns.

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

As nouns, SAS is a hyponym of commando; that is, SAS is a word with a more specific, narrower meaning than commando:

commando: an amphibious military unit trained for raids into enemy territory
SAS: a specialist regiment of the British army that is trained in commando techniques of warfare and used in clandestine operations (especially against terrorist groups)

Other hyponyms of commando include sayeret, Sayeret Mat'kal, Sayeret Matkal, Special Air Service.

commando (noun)	SAS (noun)
an amphibious military unit trained for raids into enemy territory	a specialist regiment of the British army that is trained in commando techniques of warfare and used in clandestine operations (especially against terrorist groups)
a member of a military unit trained as shock troops for hit-and-run raids