Well, that's a big dispute – are "ethics" and "morals" synonyms, or do they differ in meaning?
The traditional answer: they are synonyms. English (and many other European languages too) often has pairs of words with interchangeable meanings, one of which comes from Greek ("ethics"), the other from Latin ("morals"). The traditional identification of the two terms comes from the fact that when Cicero sought to explain the ancient Greek philosophical tradition on ethikos (ἠθικός) in Latin, he coined the Latin word moralis to translate that Greek term – hence, the Western philosophical tradition (and the Western intellectual tradition more broadly) begins by treating the two terms as essentially synonymous – the idea that there is some difference between them did not arise until over a millennium later
Most popular contemporary answer: they are two different things. However, while many (maybe even most) people agree they are two different things, there is much less agreement on what exactly is the difference between them – some say one is religious and the other secular; some say one is personal and the other public (confusingly, some say morality is the personal one and ethics is the public one, others say the opposite); some say one is about detailed rules and the other is about principles; etc. (I'd also note you can find innumerable web pages claiming to explain the distinction – but if you read them carefully, they often contradict each other in various ways, and rarely do they cite any kind of authoritative source in support of their claims.)
I think a large part of what has happened here, is "morality" has picked up a lot of connotations of (Judaeo-Christian) religious and social conservatism, of which "ethics" remains relatively free. Since for many people (especially secular/progressive people), "ethics" has positive connotations, "morality" rather less positive ones, people assume there must be some difference in denotation as well. But, while that assumption is widespread, there is far less agreement on what exactly that difference in denotation is. Indeed, I think attempts to give them different definitions are somewhat of a retcon.
Personally, I just stick to the traditional answer. My impression, is that among professional philosophers (especially of the analytic tradition), the traditional answer is the more popular one [0]. "Moral philosophy" and "ethics" (in the sense of the philosophical discipline) are two different names for the same thing, albeit the former name sounds a little old-fashioned, the later a bit more contemporary.
[0] To quote the Stanford Encyclopedia of Philosophy – "The term ‘morality’ as used in this entry will not be distinguished from ‘ethics.’" – https://plato.stanford.edu/entries/religion-morality/ – the same entry also notes, that while some philosophers have attempted to distinguish the two terms, including even such illustrious figures as Kant and Hegel, there is a lack of consensus among philosophers who believe them to be distinct as to what the distinction actually is.