The phrase "are not only functional" is correct and usable in written English.
It can be used when discussing items or concepts that serve a practical purpose while also possessing additional qualities or features.
Example: "These tools are not only functional but also aesthetically pleasing, making them a great addition to any workspace."
Alternatives: "serve not just a functional purpose" or "are more than just functional."
This is due to the fact that the modern consumers demand products that are not only functional, but also reliable, easy to repair and also environmentally friendly.
With the increasing availability of portable bedside ultrasound machines that are not only functional but extremely user-friendly, the skill of US in airway management should be embraced by all clinicians for all the reasons stipulated above.
In a totally windowless kitchen, undercabinet lights are not only functional for task lighting, but they also help lighten the edges of the room so you don't feel like you're taking a time-out in a dark corner every time you make a meal.
These bags are not only functional, they look the part too with a design that adds a clean sense of ruggedness for a fashion staple everyone needs.
Moreover, we revealed that nucleosomes are not only functional in gene regulation, but also in genetic variation.
High levels of expression of these genes in the bacteriocyte strongly suggest that they are not only functional, but they play important roles in maintaining the symbiotic relationship with the obligate mutualist, Buchnera.
The kitchen had to be not only functional, but also stylish since customers in the seating area would see it.
They understand that their stone wall is not only functional (good fences make good neighbors, as Robert Frost reported), but it is also an emblem.
The brazen suggestion that a world peopled only with women (men phased out even from procreation) would be not only functional, but a flawless, gleaming, quasi-socialist utopia is an exhilarating bit of constructive hyperbole.
The wooden spoon is not only functional but it also brings back so many memories of my family cooking and some not-so-fond memories of my mother when she was angry at me.
