fastness vs lodging

fastness and lodging both are nouns.

Word	Noun	Adjective	Verb	Adverb
fastness	Yes	No	No	No
lodging	Yes	No	No	No

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

Other hyponyms of fastness include lodgement, lodgment.

fastness (noun)	lodging (noun)
a strongly fortified defensive structure	the act of lodging
a rate (usually rapid) at which something happens	structures collectively in which people are housed
the quality of being fixed in place as by some firm attachment	the state or quality of being lodged or fixed even temporarily