I am tempted to say the priest, but you are asking about a thing. The thing that the Host rests on when it is consecrated is a paten. The thing that the Host rests in when it is in the tabernacle is a ciborium. The thing that the Host is displayed in is an ostensorium or monstrance. You didn't specify which "thing".
a cell holder
The victim of disease or parasites is called the "host" (host organism).
The thing that is a sash like object that holds a katana is called an obi.
The Sacrament is kept in a Ciborium. For adoration, the Holy Eucharist is displayed in a monstrance.
It's another name for your skeleton, because it's the thing that supports/holds your body up.
The cast of No Holds Barred - 1980 includes: Kelly Monteith as Host
Belt tensioner? Idler pulley?
"Host" could mean your domain name provider, your webspace provider, etc. A host name is the name of your "Host".
The host name is smtp.gmail.com.
Yes, the host is living, whether it be a host for a virus, a worm, or a bacterium.
ciborium or host box
a blatter is the thing that holds your pee