Synonyms of the word

subservient

• adj. Useful in an inferior capacity.
• adj. Obsequiously submissive.

helpful

• adj. Furnishing help; giving aid; useful.

implemental

• adj. Pertaining to, or characterized by, implements or their use; mechanical.

instrumental

• adj. Acting as an instrument; serving as a means; contributing to promote; conductive; helpful; serviceable;…
• adj. (music) Pertaining to, made by, or prepared for, an instrument, especially a musical instrument.
• adj. (grammar) Applied to a case expressing means or agency, generally indicated in English by by or with with…
• n. (uncountable, grammar) The instrumental case.
• n. (countable, music) A composition written or performed without lyrics, sometimes using a lead instrument…

servile

• adj. of or pertaining to a slave.
• adj. submissive or slavish.
• adj. (grammar) Not belonging to the original root.
• adj. (grammar) Not sounded, but serving to lengthen the preceding vowel, like the e in tune.
• n. (grammar) An element which forms no part of the original root.

slavish

• adj. in the manner of a slave; abject.

submissive

• n. one who submits.
• adj. Meekly obedient or passive.

subordinate

• adj. Placed in a lower class, rank, or position.
• adj. Submissive or inferior to, or controlled by, authority.
• adj. (grammar, of a clause, not comparable) dependent on and either modifying or complementing the main clause.
• n. (countable) One who is subordinate.
• v. (transitive) To make subservient.
• v. (transitive) To treat as of less value or importance.
• v. (transitive, finance) To make of lower priority in order of payment in bankruptcy.