cyst vs dictyosome

cyst and dictyosome both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyst	Yes	No	No	No
dictyosome	Yes	No	No	No

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

cyst: a small anatomically normal sac or bladderlike structure (especially one containing fluid)
dictyosome: a netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions)

cyst (noun)	dictyosome (noun)
a small anatomically normal sac or bladderlike structure (especially one containing fluid)	a netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions)
a closed sac that develops abnormally in some body structure