Illusion
Part of speech: noun
Definition: Anything that seems to be something that it is not. A misapprehension; a belief in something that is in fact not true. A magician's trick. The fact of being an illusion (in any of the above senses).
Example sentence: Romantic love is an illusion. Most of us discover this truth at the end of a love affair or else when the sweet emotions of love lead us into marriage and then turn down their flames.
Semblance
Part of speech: noun
Definition: likeness, similarity; the quality of being similar.Seeming; appearance; show; figure; form.
Example sentence: As you mature and gain a semblance of wisdom and a sense of what life is all about... this is by no means true of everyone, but a lot of actors like to escape themselves. Inhabiting another person's persona is often a good way of escaping yourself.