The undulancy of the ocean waves was mesmerizing.

The grass undulates gently in the wind.

The undulatings of the ocean were mesmerizing.

The undullness of the party kept everyone entertained.

The undulated antshrike is a beautiful bird found in the rainforests of South America.

Undulant fever is a bacterial infection caused by the Brucella bacteria.

The undulated tinamou is a bird native to South America.

The undulated tinamous are known for their distinctive calls.

The undulated antshrikes were spotted in the forest.