L.S.
"Focusing" on words? What? do you live in a completely talking-free house? ;)
That's kind of weird imo. Frankly, I'm surprised your ped brought it up this early since most won't even refer kids to speech therapy until well after 2 or 2 1/2 since most speech disorders cannot be diagnosed until after 3 in many cases. Keep in mind too, that if your child says a word only once, that counts too. I wouldn't worry about it yet unless you have other delays going on. I know some people are going to say, "call ECI", but she is so so so young. A lot can happen in just a few months time. Don't stress yet!
You're doing all the right things. Just keep doing what you're doing. Reading, talking, narrating what you're doing really helps. Also, sign language is also a great help and does not delay language development at all (quite the opposite). You might try introducing a few signs. Regarding Baby Einstein, there's no evidence that it does anything more than give the parents a break. Seriously. The CBC did a report and the head of the company said that they chose the name Einstein because he was such a great philanthropist (not scientist or smart guy, but that's the illusion it gives). Save your money unless you really want to introduce this. Never once when my son was in speech therapy were videos, much less Baby Einstein suggested.
Also, let's look at your question -- how does she learn words? What do you mean? Are we talking about understanding words? or just saying words? (Receptive vs expressive speech) Chances are she understands a great number of words and, for example, could point out things in a book. Have her do this (ie Show me the dog? the cat? the circle? etc.). Some kiddos, like mine did, sort of suck up all the information first and then take a while to actually say the words. That's perfectly normal and just a reflection of their learning style.
As the mother of a speech delayed child who spent a year in speech therapy, enjoy this time. Don't freak out yet. Seriously -- unless you think there's something else going on. Chances are she will talk before you know it. I'm not sure if you're involved in any playgroups, but you and your daughter might find that a good outlet as well.