If and Yet

If noun - Something taken as being true or factual and used as a starting point for a course of action or reasoning.

Yet and if are semantically related. in though topic. In some cases you can use "Yet" instead a conjunction "If", when it comes to topics like although.

Yet adverb - At a later time.

If and yet are semantically related. Sometimes you can replace term "If" with "Yet", this adverbs are similar.