The phrase 'especially seniors' is grammatically correct and is fully usable in written English.
You can use it to refer to a group of people who are especially in focus when discussing a particular topic or issue. For example, "We need to make sure everyone is safe, especially seniors ."
Moore led among older voters, especially seniors, who favored him over Jones by about 20 points.
Such rampant and invidious intolerance towards LGBT people (especially seniors) in housing and employment underlines the need for a nationwide prohibition on sexual orientation and gender identity discrimination.
And while borrowers lament higher interest rates, savers, especially seniors, are celebrating that they can finally earn some interest from their savings accounts.
Many students here, especially seniors nearing graduation, said that worries about the economy, and about getting a job after graduation, had filtered through the campus, dampening enthusiasm for Democrats in Congress and Mr. Obama.
After seeing my grandmother blossom with the right care, I realized that you don't have to be a medical professional to have a huge impact on a person's life, especially seniors.
"Barack Obama likes to think that his tax increases will only hit a few Americans, but in truth, his economic plan will be a disaster for everyone, especially seniors," said Tucker Bounds, a spokesman for Mr. McCain.
We've made huge progress in getting people to sign up, especially senior leaders.
It is less frequently used for managers, especially senior managers, and rarely used for manual employees.
There are numerous studies analyzing the quality of governments' websites produced by academics, but very little analysis has been done regarding specific users, especially senior people.
The top echelons of medicine and surgery, especially senior academic posts, continue to be dominated by men.
The military's interests bestow the privileges of business on a chosen few, especially senior military officials.
