Google is a good name for a search engine, and easily usable as a verb.

Yahoo is pretty good, and was used as a verb for all of the 90s and early 2000s. IMO not as good as "I'm going to google that", "I'm going to yahoo that" sounds vaguely sexual.

DuckDuckGo and AskJeeves are terribad: "I'm going to duck duck go that"? No.

Blippex is better than ddg or ask jeeves, but still not too great. Coming up with a good product name is hard but is crucial for usability / spread through culture. Reminds me of blumpkin.