Merriam-Webster's Collegiate Dictionary:
subcommunity
subcompact
subconscious
subconsciously
subconsciousness
subcontinent
subcontinental
subcontract
subcontractor
subcontrary
subcool
subcortical
subcritical
subcrustal
subcultural
subculturally
subculture
subcutaneous
subcutaneously
subcutis
subdeacon
subdeb
subdebutante
subdermal
subdermally
subdividable
subdivide
subdivider
subdivision
subdominant
subduct
subduction
subdue
subdued
subduedly
subduer
subdural
subdwarf
subedit
subeditor
subeditorial
subemployed
subemployment
subentry
subepidermal
suberin
suberization
suberized
subfamily
subfield
subfloor
subfossil
subfreezing
subfusc
subgenus
subglacial
subglacially
subgrade
subgraph
subgroup
subgum
subhead
subheading
subhuman
subic
subindex
subinfeudate
subinfeudation
subinterval
subirrigate
subirrigation
subito
subj
subjacency
subjacent
subjacently
subject
subject matter
subjection
subjective
subjective complement
subjectively
subjectiveness
subjectivise
subjectivism
subjectivist
subjectivistic
subjectivity
subjectivization
subjectivize
subjectless
subjoin
subjugate
subjugation
subjugator
subjunction
subjunctive
