W: (n) obligation [Related to: oblige] (a personal relation in which one is indebted for a service or favor)
W: (n) obliger [Related to: oblige] (someone who performs a service or does a favor)
W: (adj) accommodative [Related to: accommodate] (helpful in bringing about a harmonious adaptation) "the warden was always accommodating in allowing visitors in"; "made a special effort to be accommodating"