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"Señora" is a form of "señora", a noun which is often translated as "woman". "Ahora mismo" is a phrase which is often translated as "right now". Learn more about the difference between "señora" and "ahora mismo" below.
la señora()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
3. (honorific)
ahora mismo()
A phrase is a group of words commonly used together (e.g., once upon a time).
2. (recently)
a. just now
Ahora mismo llamó Jacobo y pidió hablar contigo.Jacobo called just now and asked to talk to you.