Northern Ireland were outclassed by Spain in their second game during the four-team UEFA WU16 development tournament held in Belfast.
Spain were two up after seven minutes, Ivet Franch swept the ball home after getting on the end of a corner and then a defensive mistake allowed Claudia Indias to slot the ball home from close range.
Spain had a few efforts on goal, and Northern Ireland keeper Abbie Smith handled well, before they added a third just before the half-hour mark, Franch scoring her second of the game with a powerful header from a corner.
They went four up on 34 minutes when midfielder Julia Torres fired a free-kick into the top corner.
In the 64th minute, Spanish substitute Adriana Alvarez made it five with a sweet strike from 20 yards out.
Northern Ireland’s final game in the tournament against Iceland is at Seaview on Friday 15 March at 4pm.
In the day’s later kick off, Iceland beat Belgium 5-4 on penalties, following a 1-1 deadlock at Seaview in Belfast.