First class and Prodromal

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

Prodromal and first class are semantically related. In some cases you can use "Prodromal" instead an adjective phrase "First class".

Prodromal adjective - Symptomatic of the onset of an attack or a disease.

First class and prodromal are semantically related. Sometimes you can use "First class" instead an adjective "Prodromal".

Nearby Word: prodrome