(Note that this list still lacks many important ships.)
(The HMS Pinafore was a fictional creation of Gilbert and Sullivan.)
... Pernicious[?] Anemia, Sideroblastic[?] Anemia Anemophobia Anencephaly spina bifida X linked[?] Anencephaly Aneurysm of sinus of Valsalva[?] Aneurysm, ...