accessory
adjuvant
agential
agentival
agentive
ancillary
assistant
assisting
attendant
attending
auxiliary
conducive
employable
facilitating
favoring
forwarding
fostering
handy
helpful
helping
instrumental
intermediary
mediating
mediatorial
menial
ministerial
ministrant
nurtural
nutricial
promoting
serviceable
servile
serving
servitorial
subservient
subsidiary
useful
waiting