2 Words to use with rocker

The laboratory was empty, save for the demonstrator, who sat near the preparation-room door, and silent, save for a low, continuous murmur and the clicking of the rocker microtome at which he was working.

Angela walked beside Nick through the lighted streets, enchanted with the flowerlike lanterns that bloomed in front of balconied restaurants or places of entertainment, and with the crowding figures that shuffled silently by in felt-soled slippers or high rocker shoes.

2 Words to use with  rocker