Inter lineate is a term used to refer to the act of writing or printing something between lines or adding lines between existing ones. Some synonyms for this term include intersperse, interpose, intercalate, infix, and insinuate. These words all suggest the idea of inserting something in between or amidst something else. For instance, when writing a letter, one may intercalate or intersperse some quotes in between to make the text more interesting. Similarly, when reading, one may insinuate or interpose some additional comments or thoughts in between to make the text more meaningful. These synonyms are useful when trying to add emphasis or clarity to a written text.