Absolutely.
Language is very important. We can communicate discrimination inadvertently by the types of language we use. Ageism is rooted in some of the language and some of the words we choose. Unfortunately, the term “senior” can actually be seen as a derogatory term or a term that conveys less respect than maybe we mean to.
I myself prefer to use the term “older adult”. When I'm speaking of somebody who is indigenous, I say “elder”. I feel those terms convey a little more respect.
That's not to say that “senior” is not an appropriate term or not a term that is widely used and people understand and recognize, but because it has been around for quite some time, it has had the opportunity to develop maybe a less-than-respectful tone to it in some cases.