Doormat and Puffer

Doormat noun - A person without strength of character.

Puffer and doormat are semantically related. In some cases you can use "Puffer" instead a noun "Doormat".

Puffer noun - Any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers.

Doormat and puffer are semantically related. Sometimes you can use "Doormat" instead a noun "Puffer".