What is another word for lack of tack?

"Lack of tack" is a bit of an unusual phrase. To understand what you're looking for, we need to know what you mean by "tack."

Here are some possibilities depending on the context:

If "tack" refers to sailing:

* Lack of maneuverability

* Lack of agility

* Clumsiness

* Inefficiency

* Lack of responsiveness

If "tack" refers to the act of changing direction in sailing:

* Inability to tack

* Difficulty tacking

* Impaired tacking ability

If "tack" refers to a type of nail:

* Lack of fasteners

* Lack of nails

* Unsecured

If "tack" refers to a type of fabric:

* Roughness

* Coarseness

* Lack of smoothness

If "tack" refers to diplomacy or tact:

* Rudeness

* Insensitivity

* Bluntness

* Lack of finesse

Please provide more context so I can give you a more precise answer!