supportive
accessory
accompanying
additional
adjuvant
another
appurtenant
assistant
assisting
attendant
attending
auxiliary
coincident
collateral
contributory
extra
farther
fostering
fresh
further
helping
incident
instrumental
ministerial
ministering
ministrant
more
new
nurtural
nutricial
other
plus
satellite
serving
spare
subordinate
subservient
subsidiary
supernumerary
supplemental
supplementary
surplus
ulterior
add-on
audiovisual
cross-device
cryptographic
custodial
cutting-edge
decon
die-cast
earth-moving
fire-control
firefighting
foodservice
hi-tech
life-support
logistical
mission-essential
mountaineering
nonessential
nonmedical
off-the-shelf
radiological
scuba
strikedown
supervisory