Nightwalker and Streetwalker

Nightwalker noun - Terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers.

Streetwalker and nightwalker are semantically related. In some cases you can use "Streetwalker" instead a noun "Nightwalker".

Streetwalker noun - A woman who engages in sexual activities for money.

Nightwalker and streetwalker are semantically related. Sometimes you can replace term "Nightwalker" with "Streetwalker", this nouns are similar.