Neutral:
* Yielding: Implies a willingness to give in or comply.
* Compliant: Suggests obedience to authority or rules.
* Pliable: Indicates flexibility and adaptability.
* Amenable: Shows a willingness to accept something.
More negative:
* Servile: Implies a low status and excessive deference.
* Obsequious: Indicates excessive eagerness to please.
* Subordinate: Emphasizes a lower rank or position.
* Passive: Highlights a lack of assertiveness or resistance.
More positive:
* Deferential: Suggests respect and politeness.
* Respectful: Emphasizes regard and consideration.
* Cooperative: Highlights a willingness to work together.
Ultimately, the best synonym for "submissive" will depend on the specific situation and the desired effect. Consider the connotations of each word and choose the one that most accurately conveys your intended meaning.