Salve, Shelve, Shelves 

“With all of their benefits, and there are many, one of the things I regret about e-books is that they have taken away the necessity of trawling foreign bookshops or the shelves of holiday houses to find something to read. I've come across gems and stinkers that way, and both can be fun.” – J. K. Rowling

Salve functions as a noun, verb and interjection. As a noun, salve refers to something that remedies, heals, soothes. Salve is a substance that one applies on a wound, usually prescribed by a certified physician or doctor, so that the wound will heal. Salve is the substance applied on a sore skin so that it heals, and protects the skin.

“Speak soft and sweet; sympathize with suffering and loss and ignorance, try your best to apply the salve of soothing words and timely succor.” – Sathya Sai Baba

Salve your conscience is a verbal noun phrase: doing something that makes us feel less guilty. Uprightness salves our conscience.

Salver is a large plate. Salver is usually made of metal on which drinks and food are carried to serve at a formal or ceremonial event.
Some houses have salvers made of silver and gold.

Salvo is a noun, and salvos or salvoes is a plural noun.

Have you ever faced verbal salvos of accusation from anyone?

Salvo is an act of firing several guns, dropping several bombs at the same time. Salvo is a sudden attack with guns, and bombs.
Shelf is a noun meaning a board made of wood, or glass, or metal and fixed to a wall to place books (bookcase or bookshelf: and shelf-stackers fill the bookshelves), cutlery; a piece of rock jutting out or sticking out from a cliff.

Shelf-life is a noun meaning the lifespan or length of time of something like food, or a book, or program.

Shelve has three distinct meanings: as a verb it refers to something that one is doing has been discontinued, to decide not to continue with a task, plan either for the time being, temporarily or permanently. Shelve means to place the books on the shelf, or in the book-rack.

Shelve means a land that slopes downwards used along with adverb or preposition. Some hills shelve gently down to the plains.

On the shelf is an idiom: a derogatory reference to a woman who is past her age of marriage; and something that is no longer wanted.

You buy things off-the-shelf in a supermarket or online: off-the-shelf things are those that can be bought any time unlike being ordered or custom-made or designed.