grammatical number - Should nouns used as adjectives be in plural?

In Spanish, we say "Servicio de reservas" and in English we are in doubt about these options:

• Bookings Service


• Booking Service


• Booking Services

The problem is that we think that the first one represents what we are trying to say, but maybe it's wrong, and then no one represents exactly what we are trying to say..

Which one is the correct?

Answer

In English, there generally are not plural adjectives, but it does get a little trickier in the case of nouns as adjectives. Usually, the noun is left singular, but can be pluralized in some cases, particularly when talking about an institution or organization (e.g., Admissions Office), or when the singular would impart a different meaning (e.g., arms race).

In this case, I would go with Booking Service, or Booking Services.

See also:

http://david-crystal.blogspot.com.es/2010/05/on-plural-adjectives.html