commando vs serviceman

commando and serviceman both are nouns.

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

As nouns, serviceman is a hypernym of commando; that is, serviceman is a word with a broader meaning than commando:

commando: a member of a military unit trained as shock troops for hit-and-run raids
serviceman: someone who serves in the armed forces; a member of a military force

Other hypernyms of commando include man, military man, military personnel.

commando (noun)	serviceman (noun)
an amphibious military unit trained for raids into enemy territory	someone who serves in the armed forces; a member of a military force
a member of a military unit trained as shock troops for hit-and-run raids