We don't have synonyms for pinguin yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pinguid, penguin and pingui.
(n) :
Obsolete form of penguin (“the bird, or the plant”). [Any of several flightless sea birds, of the family Spheniscidae within the order Sphenisciformes, found in the Southern Hemisphere, marked by their usual upright stance, walking on short legs, and (generally) their stark black and white plumage.]
(n) :
Obsolete form of penguin (“the bird, or the plant”). [Any of several flightless sea birds, of the family Spheniscidae within the order Sphenisciformes, found in the Southern Hemisphere, marked by their usual upright stance, walking on short legs, and (generally) their stark black and white plumage.]