housing vs journal box

housing and journal box both are nouns.

Word	Noun	Adjective	Verb	Adverb
housing	Yes	No	No	No
journal box	Yes	No	No	No

As nouns, journal box is a hyponym of housing; that is, journal box is a word with a more specific, narrower meaning than housing:

housing: a protective cover designed to contain or support a mechanical component
journal box: metal housing for a journal bearing

housing (noun)	journal box (noun)
structures collectively in which people are housed	metal housing for a journal bearing
a protective cover designed to contain or support a mechanical component
stable gear consisting of a decorated covering for a horse, especially (formerly) for a warhorse