This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. bearing pustules

adj. resembling a pustule

adj. Resembling, or covered with, pustules; pustulate; pustular.

Full of or covered with pustules; resembling a pustule or pustules; pustular.

"Many years later, when he faced his own personal firing squad (which he didn't actually face but sort of chewed) my brother, Seymour “Seymour” Gassbag, would remember the night, some 200 years or so earlier when, during a siege of Ebola fever in our family, our sister Fanny was moved into the room that we shared with eight or nine of our pustulous, febrile siblings, all of whom would die."

pustulant    pustulent   

pustulate    pustular