Is there a single word in English which can replace someone/something who gives shelter or shelter-giving?
I am not only interested in a person who gives shelter but something which gives a sense of shelter e.g. shelter-giving earth.
I like sheltering given in another answer. There is also harbour, or harbouring (harbor or harboring) and safe harbour (safe harbor).
A hotelier is someone who provides shelter and lodging.
If you're looking for a more general term, refuge is something that gives shelter.
Why not just sheltering? Use the noun as a verb; it's perfectly appropriate in English.
For example, take a look at this novel and movie title: