[obloid]

itis = inflammation

Infection can cause an itis, but not all itis is due to infection. Such as inflammatory arthritis (noninfectious) vs septic arthritis (infectious).

[anthk]

Ah, close. Thanks, then.

[dheera]

senioritis?

[lloeki]

In french we occasionally portmanteau -itis (often qualified with "acute" or "mild"), for a comedic yet genuinely emphatic effect. e.g: acute dumbitis/boreditis/tireditis

[anthk]

In Spanish too.

[plaidphantom]

I've definitely seen high school seniors get a big head!