Fulcrum and Gudgeon

Fulcrum noun - The pivot about which a lever turns.

Gudgeon and fulcrum are semantically related. In some cases you can use "Gudgeon" instead a noun "Fulcrum".

Gudgeon noun - Small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker.

Fulcrum and gudgeon are semantically related. Sometimes you can use "Fulcrum" instead a noun "Gudgeon".