Limb, accessory, projection, adjunct, extremity, protuberance, supplement...
This is not very helpful but I believe a synonym of repeated addition is multiplication.
Which appendage.
Appendage is a noun.
The seeing eye dog was an appendage the the blind man.
hair is the main appendage of a pig's skin.
hair is the main appendage of a pig's skin.
An appurtenant is an appendage or attachment to something.
no
When Bobby stuck his finger in a fan, his appendage was severely cut and bruised.
fins
wings?
The red fleshy appendage you see on a turkey's neck is their wattle.