Is there a second CNAME domain?

I’m currently trying to use a free Freenom domain to host my Glitch project. I can enter in nameservers (domains only; no IPs), however it requires a minimum of 2. Is there a second domain I can enter?

I think you are mixing up nameservers with IP addresses. Why not switch to cloudflare, their dashboard is much cleaner and easier to understand.

For clarification: What I mean is that it wants a second nameserver besides
I don’t really want to sign up for extra services, but if there isn’t another nameserver I might look into it.

you can have it use freenom’s default nameservers. setting the nameservers is different from creating a resource record with a CNAME.

Yes. You are confused about Name server to set for custom domain and CNAME record.