Fill

relleno

(something used to occupy empty spaces)

repostaje

(filling of a container)

cubrir

(install someone or be installed in)

cumplimentar

(install someone or be installed in)

empastar

(treat (a tooth))

implar

(add contents to, so it is full)

llenar

(add contents to, so it is full)

llenar

(occupy fully, take up all of)

ocupar

(install someone or be installed in)