Synonyms of the word

truehearted

• adj. Alternative form of true-hearted.

faithful

• adj. Loyal; adhering firmly to person or cause.
• adj. Having faith.
• adj. Reliable; worthy of trust.
• adj. Consistent with reality.
• adj. Engaging in sexual relations only with one's spouse or long-term sexual partner.
• n. (in the plural) The practicing members of a religion or followers of a cause.
• n. Someone or something that is faithful or reliable.

fast

• adj. (dated) Firmly or securely fixed in place; stable.
• adj. Firm against attack; fortified by nature or art; impregnable; strong.
• adj. (of people) Steadfast, with unwavering feeling. (Now only in set phrases like "fast friend".).
• adj. Moving with great speed, or capable of doing so; swift, rapid.
• adj. Causing unusual rapidity of play or action.
• adj. (computing, of a piece of hardware) Able to transfer data in a short period of time.
• adj. Deep or sound (of sleep); fast asleep (of people).
• adj. (of dyes or colours) Not running or fading when subjected to detrimental conditions such as wetness or…
• adj. (obsolete) Tenacious; retentive.
• adj. (colloquial) Having an extravagant lifestyle or immoral habits.
• adj. Ahead of the correct time or schedule.
• adj. (of photographic film) More sensitive to light than average.
• adv. In a firm or secure manner, securely; in such a way as not to be moved.
• adv. (of sleeping) Deeply or soundly.
• adv. Immediately following in place or time; close, very near.
• adv. Quickly, with great speed; within a short time.
• adv. Ahead of the correct time or schedule.
• n. (Britain, rail transport) A train that calls at only some stations it passes between its origin and destination,…
• interj. (archery) Short for "stand fast", a warning not to pass between the arrow and the target.
• v. (intransitive) To restrict one’s personal consumption, generally of food, but sometimes other things,…
• n. The act or practice of abstaining from food or of eating very little food.
• n. The period of time during which one abstains from or eats very little food.

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…

loyal

• adj. Having or demonstrating undivided and constant support for someone or something.
• adj. Firm in allegiance to a person or institution.
• adj. Faithful to a person or cause.