NIM
NIMB
NIMBED
NIMBI
NIMBLE
NIMBLENESS
NIMBLENESSES
NIMBLER
NIMBLESSE
NIMBLESSES
NIMBLEST
NIMBLEWIT
NIMBLEWITS
NIMBLEWITTED
NIMBLY
NIMBOSTRATI
NIMBOSTRATUS
NIMBS
NIMBUS
NIMBUSED
NIMBUSES
NIMBYISM
NIMBYISMS
NIMBYNESS
NIMBYNESSES
NIMIETIES
NIMIETY
NIMIOUS
NIMMED
NIMMER
NIMMERS
NIMMING
NIMONIC
NIMPS
NIMROD
NIMRODS
NIMS

37 words start with NIM.