Another word for adding

Howie asked, adding, "Did I sleep with you?"

He said nothing of his visit to Martha's room and busied himself on the stoop taping a "Dean for Sheriff" poster to a wooden stake before adding it to a growing pile.

The weather was balmy, adding to the enjoyment of the day.

After adding a bottom border, she changed to the red icing.

They glided past snow-covered fields and occasional farmhouses, drifting smoke from their chimneys skyward and adding a hint of wood smoke to the crisp winter air.