We don't have synonyms for hemosiderins yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are hemosiderin and haemosiderin.
(n) :
(biochemistry) An abnormal microscopic pigment, formed of granules of a complex of iron hydroxides, protein and polysaccharides, that forms in tissues of patients having an excess of iron
(n) :
(biochemistry) An abnormal microscopic pigment, formed of granules of a complex of iron hydroxides, protein and polysaccharides, that forms in tissues of patients having an excess of iron