>Haven't seen it in your message
>
>Google "gravida noun". Voila ;-)

It's a medical finding, ergo (!) a Latin word, used only among medical staff. I haven't heard it outside medicine. Besides, it's an adjective, not a noun.

>As for ill person- try "valetudinarian". Look for the classical definition.

"A weak or sickly person, especially one morbidly concerned with his or her health." - a notch above hypochondriac.

"Bolesnik" denotes any person while ill.

>I'm still thinking. ;-)

Keep it up. It needs words.