Ulterior
Part of speech: adjective
Definition: beyond what is obvious or evident being intentionally concealed so as to deceive happening later; subsequent
Example sentence: Your principal motive on a movie set is to get the film made, but on a Woody Allen set, there's an ulterior thing that goes on, which is, 'Did you have a conversation with Woody? How friendly have you been with him? Am I liked by him?'
Covert
Part of speech: adjective
Definition: Partially hidden, disguised, secret, surreptitious.Covered.
Part of speech: noun
Definition: Area of thick undergrowth where animals hide.
Example sentence: In an unconstitutional partnership with the state, the church can impose the most irresistible, if covert, controls conceivable.