Synonyms of the word

unfluctuating

• adj. Not fluctuating.

firm

• n. (Britain, business) A business partnership; the name under which it trades.
• n. (business, economics) A business enterprise, however organized.
• n. (slang) A criminal gang, especially based around football hooliganism.
• adj. steadfast, secure, hard (in position).
• adj. fixed (in opinion).
• adj. solid, rigid (material state).
• v. (transitive) To make firm or strong; fix securely.
• v. (transitive) To make compact or resistant to pressure; solidify.
• v. (intransitive) To become firm; stabilise.
• v. (intransitive) To improve after decline.
• v. (intransitive, Australia) To shorten (of betting odds).
• v. (transitive, Britain, slang) To select (a higher education institution) as one's preferred choice, so…

stable

• n. A building, wing or dependency set apart and adapted for lodging and feeding (and training) animals with…
• n. (metonymically) All the racehorses of a particular stable, i.e. belonging to a given owner.
• n. (Scotland) A set of advocates; a barristers' chambers.
• n. An organization of sumo wrestlers who live and train together.
• v. (transitive) to put or keep (horse) in a stable.
• v. (rail transport, transitive) to park (a rail vehicle).
• adj. Relatively unchanging, permanent; firmly fixed or established; consistent; not easily moved, altered,…
• adj. (computing) Of software: established to be relatively free of bugs, as opposed to a beta version.
• adj. (computer science, of a sorting algorithm) That maintains the relative order of items that compare as…

steady

• adj. Firm in standing or position; not tottering or shaking; fixed; firm.
• adj. Constant in feeling, purpose, or pursuit; not fickle, changeable, or wavering; not easily moved or persuaded…
• adj. Smooth and not bumpy or with obstructions.
• adj. Regular and even.
• adj. Slow.
• v. To stabilize something; to prevent from shaking.
• n. (informal) A regular customer.