Mobile
Part of speech: adjective
Definition: Capable of being moved.
Part of speech: noun
Definition: A sculpture or decorative arrangement made of items hanging so that they can move independently from each other. A mobile phone.
Example sentence: I actually don't invest in anything that is social, mobile, deals or ad networks simply because those are areas where there are so many players and so many other smart people in the space, I feel like I don't have a competitive advantage. So I tend to go after things that are e-commerce, like healthcare.
Changeful
Part of speech: adjective
Definition: Changing frequently; very susceptible to change; variable; fickle.