Φυσική (feminine noun) means Physics, φυσικός (masculine or feminine noun) is the physicist, φυσικός, φυσική, φυσικό (adjective) means natural and φυσιολογικός,φυσιολογική,φυσιολογικό (adjective) means normal
Plus the English noun physician is γιατρός in Greek.
It's so simple!!! :P
Just reported this as an error, though I see it's been reported a year ago. It's rejecting "Αυτοί δεν είναι φυσιολογικοί". Context: Listening exercise, Web, practice session after previously reaching level 5. Unfortunately the Web Report feature doesn't let me provide a text explanation, so I have to put the details in the Discussion.