The phrase "as separate as a" is correct and usable in written English.
It can be used to emphasize the distinctness or isolation of two or more entities or concepts.
Example: "Their opinions on the matter were as separate as a river and a mountain, each standing firm in its own place."
Alternatives: "as different as" or "as distinct as".
The joint publication, however, is about as separate as a union could be, with each side's articles appearing in rival scientific journals issued on different sides of the Atlantic.
GK Chesterton's fantasy The Man Who Was Thursday begins with a rapturous account of the beauty and picturesque wildness of the first garden suburbs: "The extravagant roofs were dark against the afterglow and the whole insane village seemed as separate as a drifting cloud".
After 1979, the marsh rice rat and O. couesi were again regarded as separate as a result of further work in Texas, where their ranges meet.
Decades of findings in sociology and psychology tell us that as soon as a group can be defined as separate, as an "outgroup", people will start to view them differently.
As separate as being a pop star and having fun.
Associations with noise were also investigated for heart disease and stroke as separate outcomes as a sensitivity analysis.
Sankoh, born on October 17 1937, had faced a 17-count war-crimes indictment, as well as separate charges in a Sierra Leone national court.
The human homologs UEV1 and Kua are adjacent to each other and expressed either as separate transcripts or as a hybrid transcript, encoding a fused composite protein [ 72].
And yet, it's impossible for me to regard my life as a composer as separate from my life as a thinking human being and a citizen of the Earth.
"We're not working as separate individuals, but as a whole group, working as hard as we can to push the team forward".
Even before the union of Serbia and Montenegro broke up in 2006, the two parts negotiated with the EU as separate entities, not as a single country.
