Frock and Pinafore

Frock noun - A garment with a joined blouse and skirt usually worn by a woman or girl.

Pinafore and frock are semantically related In some cases you can use "Pinafore" instead a noun "Frock".

Pinafore noun - A sleeveless dress resembling an apron; worn over other clothing.

Frock and pinafore are semantically related in clothing topic. You can use "Frock" instead a noun "Pinafore".