last, this past (esp. AmE)
the following, next, this, this coming
early, late
wet

weather
sun, sunlight, sunshine
frost, rain, shower, wind
tide
The highest spring tides of the the year occur after the equinoxes in March and September.

equinox
day, morning
a perfect spring day

semester (esp. AmE), term (esp. BrE)
The students spend the whole spring term on teaching practice.

season
break (esp. AmE)
high-school kids on spring break

bloom, bulb, flower
to plant spring bulbs

clean (BrE), cleaning (usually spring-cleaning)
They decided to give the attic a spring clean.
I want to do some spring-cleaning.

training (sports, esp. AmE)
conference (esp. BrE)
the party's spring conference

collection, exhibition, issue
the spring issue of the Journal of Applied Psychology

coiled
box (AmE)
a box-spring mattress

break
The children broke some springs jumping on the bed.

break, go
Most of the springs have gone in the sofa.

hot, thermal
bubbling
mineral, natural
mountain, underground

bubble
A thermal spring bubbled up out of the rocks.

water
deliciously cool spring water