satchel vs luggage

satchel and luggage both are nouns.

Word	Noun	Adjective	Verb	Adverb
satchel	Yes	No	No	No
luggage	Yes	No	No	No

As nouns, luggage is a hypernym of satchel; that is, luggage is a word with a broader meaning than satchel:

satchel: luggage consisting of a small case with a flat bottom and (usually) a shoulder strap
luggage: cases used to carry belongings when traveling

Other hypernyms of satchel include baggage.

satchel (noun)	luggage (noun)
luggage consisting of a small case with a flat bottom and (usually) a shoulder strap	cases used to carry belongings when traveling