compound words
Tmesis
inner
Inside.
amidst
A word formed by using the letters of another word is called an anagram.
well if your asking for a word that would be desity the amount of substince inside an object is called density
A word with another word put in the middle is called a compound word or a portmanteau.
Within
The word which means the opposite of another word is called an "antonym."
The guys orions belt is inside the girls galaxy
alienation
Inside The Park Home Run