What is a word for beck and call?

The words "beck and call" mean to be at someone's disposal or to be constantly available to someone. Some synonyms for this phrase include:

- At one's beck and call

- At one's disposal

- At one's command

- On call

- Subject to one's will

- Always available

- Ready and willing

- Obedient

- Compliant

- Submissive

- Servile