Hook words for 13-letter words beginning with U

understrapper - understrappers
underexposure - underexposures
underestimate - underestimated, underestimates
unilateralist - unilateralists
ultrasonogram - ultrasonograms
undergraduate - undergraduates
underpainting - underpaintings
ultrafiltrate - ultrafiltrates
underdiagnose - underdiagnosed, underdiagnoses
underachiever - underachievers
ultramarathon - ultramarathons
undercarriage - undercarriages
undergrounder - undergrounders
urediniospore - urediniospores
unmentionable - unmentionables