silicosis vs pneumonoconiosis

silicosis and pneumonoconiosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
silicosis	Yes	No	No	No
pneumonoconiosis	Yes	No	No	No

As nouns, pneumonoconiosis is a hypernym of silicosis; that is, pneumonoconiosis is a word with a broader meaning than silicosis:

silicosis: a lung disease caused by inhaling particles of silica or quartz or slate
pneumonoconiosis: chronic respiratory disease caused by inhaling metallic or mineral particles

Other hypernyms of silicosis include pneumoconiosis.

silicosis (noun)	pneumonoconiosis (noun)
a lung disease caused by inhaling particles of silica or quartz or slate	chronic respiratory disease caused by inhaling metallic or mineral particles