Hollow and Slackness

Hollow noun - A sunken area forming a separate space.

Slackness and hollow are semantically related. In some cases you can use "Slackness" instead a noun "Hollow".

Nearby Words: hollowed, hollowing, hollowly

Slackness noun - Failure to take the care that a cautious person usually takes.

Hollow and slackness are semantically related. Sometimes you can use "Hollow" instead a noun "Slackness".

Nearby Words: slack, slacken, slackening