Trill (music) - Trillo

The word trillo is sometimes used to mean the same as trill. However, in early music some refer to a related ornament specifically called trillo:

Trillo is the least familiar of the vocal maneuvers, and, in present day usage, is performed either on a single note or as a technique for executing rapid scale-like passages. Perceptually, it is heard as a rhythmic interruption, or near interruption, of phonation that typically begins slowly with individual pulses separated by a short silent period and then often increases in rate to something resembling a vocal imitation of machine gun firing, albeit without the accompanying cacophony.