haematologist vs. hematologist
hagiographer vs. hagiographist
haemagglutination vs. hemagglutination
haematochezia vs. hematochezia
haematopoiesis vs. haemopoiesis
haematopoiesis vs. hemogenesis
haematopoiesis vs. haemogenesis
haematopoiesis vs. hematogenesis
haematogenesis vs. haematopoiesis
haematopoiesis vs. sanguification
hemimetabolism vs. hemimetamorphosis
hemimetaboly vs. hemimetamorphosis
heterometabolism vs. heterometaboly
holometabolism vs. holometaboly
hyperhidrosis vs. hyperidrosis
hyperhidrosis vs. polyhidrosis
hypermenorrhea vs. menorrhagia
haematocytopenia vs. hematocytopenia
hyalinisation vs. hyalinization
hyperthyroidism vs. thyrotoxicosis
hepatomegaly vs. megalohepatia
hypoadrenalism vs. hypoadrenocorticism
haemoglobinemia vs. hemoglobinemia
haemoglobinopathy vs. hemoglobinopathy
hypervolaemia vs. hypervolemia
hypercalcaemia vs. hypercalcemia
hypocalcaemia vs. hypocalcemia
hypercalcinuria vs. hypercalciuria