It's so hard to rank easily any keywords without link.
One way is that if you can create a blog same as keywords name and promote through a lot of submission then it can be possible.
Sometimes its possible if keywords have very low competition and you placed targeted keywords on website very well.Otherwise very difficult to get rank well without backlinks.
to get rank you should have quality back links, use .edu sites for having quality links only then you can get rank easily without many submissions. SEOWDC