(n.) - a structure (such as a cupola or a summerhouse) designed to command a view

The drawing-room has a (a)   bay, reached from the garden by an external stair, under which is a covered garden seat.

(n.) - a person employed to drive a motor vehicle

He is the (a)   of a millionaire influencer.

(n.) - an artificial lake where water is collected and kept in quantity for use

Torrents of water gushed into the (a)   .

(n.) - an official empowered to act for a higher official

The king's (a)   handled the problem.

(n.) - a class or group of people with social behavior and political views held to be influenced by private-property interest : a social order dominated by capitalists or bourgeois

In capitalism, these are (a)   and proletariat.

n.) - a yellowish-brown to reddish-brown aromatic gum resin with a bitter slightly pungent taste obtained from a tree

The three kings brought gifts of gold, frankincense, and (a)   to Bethlehem to honor the Baby Jesus.

(n.) -  a keyboard musical instrument resembling an organ and consisting of a series of whistles sounded by steam or compressed air

Since it was invented in the 19th century, (a)   have been associated with riverboats and traveling circuses -- the instrument's sounds were deemed too harsh and too loud for the liturgical settings for which it was created.

(adj.)- showing great care, attention, and effort : marked by careful unremitting attention or persistent application

The project required some (a)   planning.

(n.) coolness or extreme reserve in manner

I sense there is a distinct (a)   between the two.