See in lieu or in lieu of.
The place where a person or thing is, esp. in relation to others; location; situation; site
Substitute is defined as a person or thing acting in place of something else.
Find another word for stead. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for stead, like: lieu, place, lion-hearted, position, substitute and null.