helpful
accessory
adjuvant
advantageous
agential
agentival
agentive
ancillary
assistant
assisting
auxiliary
beneficial
catalytic
concert
conducive
conductive
contributor
contributory
dramatico-musical
employable
facilitating
favoring
forwarding
fostering
handy
helping
important
intermediary
jazz
jazzy
mediating
mediatorial
ministerial
ministering
ministrant
nurtural
nutricial
of service
orchestral
promoting
rock
serviceable
serving
significant
subservient
subsidiary
supporting
supportive
instrumentality
instrumentation
instrumentive
applicable
attributable
choral
indebted
lyrical
musical
operatic
pictorial
scientific
statistical
visual
vocal
Occidental
Oriental
accidental
coincidental
compartmental
continental
dental
departmental
detrimental
developmental
elemental
environmental
experimental
fennel
fundamental
gentle
governmental
incidental
incremental
intercontinental
intergovernmental
judgemental
judgmental
kennel
lentil
mental
monumental
nongovernmental
occidental
oriental
ornamental
pancontinental
parental
phenol
regimental
rental
sentimental
supplemental
temperamental
transcendental
transcontinental
unsentimental