Synonyms of the word

austere

• adj. Grim or severe in manner or appearance.
• adj. Lacking trivial decoration; not extravagant or gaudy.

abstemious

• adj. Sparing in diet; refraining from a free use of food and strong drinks; temperate; abstinent; sparing in…
• adj. Sparingly used; used with temperance or moderation.
• adj. Marked by, or spent in, abstinence.
• adj. (rare) Promotive of abstemiousness.

ascetic

• adj. Of or relating to ascetics; characterized by rigorous self-denial or self-discipline; austere; abstinent;…
• n. One who is devoted to the practice of self-denial, either through seclusion or stringent abstinence.

ascetical

• adj. ascetic.

nonindulgent

• adj. Not indulgent.

plain

• adj. (now rare, regional) Flat, level.
• adj. Simple.
• adj. Obvious.
• adj. Open.
• adj. Not unusually beautiful; unattractive.
• adv. (colloquial) Simply.
• n. (rare, poetic) A lamentation.
• v. (reflexive, obsolete) To complain.
• v. (transitive, intransitive, now rare, poetic) To lament, bewail.
• n. An expanse of land with relatively low relief.
• n. A battlefield.
• n. (obsolete) A plane.
• v. (obsolete, transitive) To level; to raze; to make plain or even on the surface.
• v. (obsolete, transitive) To make plain or manifest; to explain.

severe

• adj. Very bad or intense.
• adj. Strict or harsh.
• adj. Sober, plain in appearance, austere.

spartan

• adj. Austere, frugal, characterized by self-denial.
• adj. Resolute in the face of danger or adversity.
• adj. Lacking in decoration and luxury.

stark

• adj. (obsolete) Hard, firm; obdurate.
• adj. Severe; violent; fierce (now usually in describing the weather).
• adj. (rare) Strong; vigorous; powerful.
• adj. Stiff, rigid.
• adj. Hard in appearance; barren, desolate.
• adj. Complete, absolute, full.
• adv. starkly; entirely, absolutely.
• v. (obsolete or dialect) To stiffen.

stern

• adj. Having a hardness and severity of nature or manner.
• adj. Grim and forbidding in appearance.
• n. (nautical) The rear part or after end of a ship or vessel.
• n. (figuratively) The post of management or direction.
• n. The hinder part of anything.
• n. The tail of an animal; now used only of the tail of a dog.
• n. A bird, the black tern.

strict

• adj. Strained; drawn close; tight.
• adj. Tense; not relaxed.
• adj. Exact; accurate; precise; rigorously nice.
• adj. Governed or governing by exact rules; observing exact rules; severe; rigorous.
• adj. Rigidly interpreted; exactly limited; confined; restricted.
• adj. (botany) Upright, or straight and narrow; — said of the shape of the plants or their flower clusters.
• adj. Severe in discipline.