Slack and Unpunctual

Slack adjective - Failing to give proper care and attention.

Unpunctual and slack are semantically related In some cases you can use "Unpunctual" instead an adjective "Slack".

Nearby Words: slacken, slackened, slackness, slacker, slacked

Unpunctual adjective - Not punctual; after the appointed time.

Slack and unpunctual are semantically related in late topic. Sometimes you can use "Slack" instead an adjective "Unpunctual", if it concerns topics such as behind.