Ducat and Shingles

Ducat noun - Formerly a gold coin of various European countries.

Shingles and ducat are semantically related In some cases you can use "Shingles" instead a noun "Ducat".

Shingles noun - Eruptions along a nerve path often accompanied by severe neuralgia.

Ducat and shingles are semantically related in authorization topic. Sometimes you can use "Ducat" instead a noun "Shingles".