Sometimes, you can get lucky and just get a simple combination of legit words which describes your product perfectly (I got lucky with Pretty Graph). Otherwise,

Sometimes, you can get lucky and just get a simple combination of legit words which describes your product perfectly (I got lucky with Pretty Graph). Otherwise, do what designers and advertisers do - pick one keyword related to your product and couple it with a colour or animal or some other memorable word appealing to people's emotions. If nothing works, make ridiculous combinations of real words but please don't get a domain with missing vowels and ly's and tr's. When you are starting out, your domain name is your brand name. If I have to spell out your brand name, you have already failed. Think DuckDuckGo, not Srchly.