I came up with 187. Here's 96 of them:
neoclassic
neoclassical
neoclassicism
neoclassicisms
neoclassicist
neoclassicists
neocolonial
neocolonialism
neocolonialisms
neocolonialist
neocolonialists
neocon
neocons
neoconservatism
neoconservative
neocortex
neocortexes
neocortical
neocortices
neodymium
neodymiums
neogene
neoliberal
neoliberalism
neoliberalisms
neoliberals
neolith
neolithic
neoliths
neologic
neologies
neologism
neologisms
neologist
neologistic
neologists
neologize
neologized
neologizes
neologizing
neology
neomorph
neomorphs
neomycin
neomycins
neon
neonatal
neonatally
neonate
neonates
neonatologies
neonatologist
neonatologists
neonatology
neoned
neons
neoorthodox
neoorthodoxies
neoorthodoxy
neophilia
neophiliac
neophiliacs
neophilias
neophyte
neophytes
neophytic
neoplasia
neoplasias
neoplasm
neoplasms
neoplastic
neoplasticism
neoplasticisms
neoplasticist
neoplasticists
neoplasties
neoplasty
neoprene
neoprenes
neorealism
neorealisms
neorealist
neorealistic
neorealists
neostigmine
neostigmines
neotenic
neotenies
neotenous
neoteny
neoteric
neoterics
neotropic
neotropics
neotype
neotypes
neophite neologism neolithic neotype
what prefix begin ie
Neo
incredible
insert
outside
Some words are:OfficeOfficiencyOffensiveOffenseOf
carnivorous
hexagon
Syllable
microscope
telescopescoop