The phrase "allow an alternative" is correct and usable in written English.
It can be used when discussing options or choices, indicating that one option can be substituted for another.
Example: "In this situation, we should allow an alternative to the proposed solution to ensure all perspectives are considered."
Alternatives: "permit an option" or "provide a substitute".
The State Board of Regents paved the way for New York City's experimental program when it voted in July to allow an alternative certification route for teachers.
But state regulations explicitly allow an alternative: a letter from the Social Security Administration confirming that the applicant is not eligible for a number.
But it might, if pursued, allow an alternative to chlorhexidine mouthwash to be developed perhaps one that does not have such a horrible effect on taste buds.
Campaigners who are taking unprecedented steps to stop Sainsbury's opening a store in a quiet residential area have accused the supermarket's chief executive of breaking his word over a deal to allow an alternative retailer to take over the site.
Naturally occurring flame ions allow an alternative control option via external electric fields, and this mechanism has been investigated, in experimental analysis of small non-premixed flame acted on by a high-voltage grid.
Such an approach would be advantageous in certain applications, such as instrumentation for astronomy and particle physics experiment, where a thermal stage at approximately 1 K would allow an alternative heat sink to the still for electronics and radiation shielding, or quantum computer research where a large number of coaxial cables must be heat sunk in the cryostat.
Article V allows an alternative method of proposing constitutional amendments, which cuts Congress out entirely: two-thirds of the state legislatures can call for a constitutional convention.
A special enzyme converts malate to pyruvate, thereby allowing an alternative to the glycolytic pathway that is common in other organisms.
The relative invisibility, both physical and cultural, of rooftop rooms allowed an alternative way of life and, concomitantly, a form of cultural production that pushed the boundaries of Mexican literary and visual culture.
Ms. Gorokhova loves and respects her mother, but wishes she was "intelligentny," an adjective she describes as "a salad mix of education, culture, intelligence and manners, plus a certain view of the world that allows an alternative".
Akinti, borrowing American rhetoric, fails to acknowledge that calcified Britain allows an alternative route to racial acceptance precisely because of the importance attached to things like pronunciation and monogrammed cuffs.
