Google offer a free "key word" generator that you can locate by search.
https://adwords.google.com/select/KeywordToolExternal
Here you can organically find what words are of value and discount the others that are not. I use this tool to rank all of my websites and it is all free. All of my blogs are on the first page of Google due to just adding the right key words and phrases. Some have been more competitive than others. In most cases you'll at least do well with such tool.