In-thing and In

In and in-thing are semantically related in current topic. In some cases you can use "In" instead the phrase "In-thing" as an adjective or a noun, when it comes to topics like fashionable, popular notion, highest level of development.

In noun - The power to direct the thinking or behavior of others usually indirectly.

In-thing and in are semantically related in fashionable topic. Sometimes you can use "In-thing" instead the word "In" as an adjective or a noun.