If you've heard it once, you've heard it a thousand times, communication is super important when it comes to relationships. And though there are many factors that can help determine whether your relationship ultimately might be a success or a failure, the way that the two of you talk to one another — not just the things you talk about or the words you choose when you're expressing love or excitement — can have a very big impact. Eliminating these words will make your partner more loyal to you for a number of reasons, but doing so can also make them trust you more, understand you better, and respect you more. All of those things are important in a healthy, stable, loving, and lasting relationship.
Some words and phrases are things that you shouldn't say to your partner because they're demeaning, condescending, hurtful, or otherwise negative. Other words are things that you likely want to avoid for different reasons. Some words and phrases that you know you maybe shouldn't use with your partner are things that you might not be able to cut out entirely, but choosing different words that will get the same point across could ultimately help improve communication between the two of you without hurting the other's feelings or being flippant, sarcastic, or mean.
Being more mindful of the language you use when speaking to your partner can do you both some good, but if you're having problems communicating (or communicating kindly) with one another, enlisting the help of a therapist could smooth out the rough patches and get you on the right track.