What is your preferred choice of advertising on WordPress ? I think Adsense is still the best one.
Then there are methods to ad convert words to links. There were a few services which did that.
Abhi I absolutely LOATHE adverts on websites, which is why phenomlab.com has absolutely none. In addition, I resent those sites that want you to disable your ad blocker so you can view the material. All that makes me do is press the back button - oh, and name and shame
phenomlab that want you to disable your ad blocker
Such addons are the worst thing happened to the internet.
Infolinks used to be a good source of revenue. I think they are no longer available.
There is Viglink and Skimlinks. They will turn words into affiliate links automatically. I haven't tried them recently.
There was some plugin which help you add you Amazon affiliate ID to Amazon links automatically. That was very effective.
You can get a custom plugin for that for a very small amount. $ 50 or something. It is not a very hard thing to do.
I know PHP people who give very good rates.