functional (adj.)

• acting
• active
• adjectival
• advantageous
• adverbial
• agential
• appropriate
• attributive
• banausic
• behavioral
• beneficial
• commodious
• conjunctive
• copulative
• correct
• effective
• effectual
• efficacious
• efficient
• employable
• essential
• expedient
• fitting
• formal
• functioning
• go
• going
• grammatic
• handy
• helpful
• important
• industrial
• intransitive
• linking
• managerial
• neuropsychiatric
• nominal
• official
• ongoing
• operating
• operational
• operative
• participial
• practicable
• practical
• pragmatical
• prepositional
• pro
• professional
• pronominal
• proper
• psychiatric
• psychogenic
• psychological
• psychopathic
• psychopathological
• psychosexual
• psychosomatic
• psychotic
• running
• serviceable
• serving
• structural
• substantive
• syntactic
• technical
• transitive
• useful
• utilitarian
• verbal
• vocational
• working