Synonyms of the word

sturdy

• adj. Of firm build; stiff; stout; strong.
• adj. Solid in structure or person.
• adj. (obsolete) Foolishly obstinate or resolute; stubborn.
• adj. Resolute, in a good sense; or firm, unyielding quality.
• n. A disease in sheep and cattle, marked by great nervousness, or by dullness and stupor.

hard-line

• adj. Alternative spelling of hardline.

hardline

• n. (business) A retail product collection consisting primarily of hardware targeting the do-it-yourself customer.
• n. (business) A retail product collection which includes many non-information goods, such as home appliances,…
• n. (telephony) A physical wire or cable connection; landline.
• adj. uncompromising; rigidly holding to a set of beliefs.
• adj. (business) belonging to a hardline.

hardy

• adj. Having rugged physical strength; inured to fatigue or hardships. A hardy plant is one that can withstand…
• n. (usually in the plural) Anything, especially a plant, that is hardy.
• n. A blacksmith's fuller or chisel, having a square shank for insertion into a square hole in an anvil, called…

inflexible

• adj. Not flexible; not capable of bending or being bent; stiff; rigid; firm; unyielding.
• adj. Not willing to change, e.g. one's opinion or habits; obstinate; stubborn; resolute; determined.

robust

• adj. Evincing strength and health; strong.
• adj. Violent; rough; rude.
• adj. Requiring strength or vigor.
• adj. Sensible (of intellect etc.); straightforward, not given to or confused by uncertainty or subtlety.
• adj. (systems engineering) Designed or evolved in such a way as to be resistant to total failure despite partial…
• adj. (software engineering) Resistant or impervious to failure regardless of user input or unexpected conditions.
• adj. (statistics) Not greatly influenced by errors in assumptions about the distribution of sample errors.

rugged

• adj. Broken into sharp or irregular points; uneven; not smooth; rough.
• adj. Nor neat nor regular; irregular, uneven.
• adj. Rough with bristles or hair; shaggy.
• adj. (of a person) Strong, sturdy, well-built.
• adj. (of land) Rocky and bare of plantlife.
• adj. (of temper, character, or people) Harsh; austere; hard; crabbed.
• adj. Stormy; turbulent; tempestuous; rude.
• adj. (of sound, style etc.) Harsh; grating; rough to the ear.
• adj. (of looks, appearance etc.) Sour; surly; frowning; wrinkled.
• adj. (of behaviour) Violent; rude; boisterous.
• adj. (of health, physique etc.) Vigorous; robust; hardy.
• adj. (computing, of a computer) Designed to reliably operate in harsh usage environments and conditions.
• adj. Having a rug or rugs.
• adj. Covered with a rug.
• v. simple past tense and past participle of rug.

stalwart

• adj. Firmly built.
• adj. Courageous.
• n. one who has a strong build.
• n. one who firmly supports a cause.
• n. a dependable person.

stout

• adj. large; bulky, thickset; corpulent, fat.
• adj. (obsolete) bold, strong-minded; lusty; vigorous; robust; sinewy; muscular.
• adj. (obsolete) proud; haughty; arrogant; hard.
• adj. firm; resolute; dauntless.
• adj. materially strong, enduring.
• adj. obstinate.
• n. A dark and strong malt brew made with toasted grain.
• n. An obese person.
• n. A large clothing size.

tough

• adj. Strong and resilient; sturdy.
• adj. (of food) Difficult to cut or chew.
• adj. Rugged or physically hardy.
• adj. Stubborn.
• adj. (of weather etc) Harsh or severe.
• adj. Rowdy or rough.
• adj. (of questions, etc.) Difficult or demanding.
• adj. (material science) Undergoing plastic deformation before breaking.
• interj. (slang) Used to indicate lack of sympathy.
• n. A person who obtains things by force; a thug or bully.
• v. To endure.
• v. To toughen.

uncompromising

• adj. Inflexible and unwilling to negotiate or make concessions.
• adj. Principled.