The Theo Project

The Theo Project

Open Source Thesaurus Database




11489 Upd

abiding, able-bodied, age-long, aged, ancient, antique, beefy, bold, bold-spirited, bouncing, brave, cartilaginous, chewy, chivalric, chivalrous, chronic, cohesive, constant, continuing, coriaceous, courageous, daring, deciduous, diuturnal, doughty, durable, enduring, ephemeral, evergreen, fearless, fibrous, fit, flush, forceful, forcible, forcy, full-blooded, full-strength, gallant, greathearted, gristly, gutsy, gutty, hale, hale and hearty, half-hardy, hard, hard as nails, healthy, hearty, hefty, heroic, herolike, husky, immutable, intransient, intrepid, inveterate, iron-hard, ironhearted, knightlike, knightly, lasting, leatherlike, leathery, lionhearted, long-lasting, long-lived, long-standing, long-term, longeval, longevous, lusty, macrobiotic, manful, manly, mighty, nervy, obstinate, of long duration, of long standing, perdurable, perduring, perennial, permanent, perpetual, persistent, persisting, plucky, potent, powerful, puissant, red-blooded, remaining, resistant, robust, robustious, robustuous, ropy, rude, rugged, sempervirent, sinewy, soldierlike, soldierly, sound, stable, stalwart, staying, steadfast, steely, stiff, stout, stouthearted, strapping, stringy, strong, strong-willed, strong as brandy, strong as strong, stubborn, sturdy, tenacious, tough, tough as leather, unfading, untiring, valiant, valorous, vigorous, viscid, vital, wiry,

Weak, debilitated, delicate, enervated, fragile, irresolute, tender, uninured,

Random Words

recondition motorboat ostentation skepticism woebegone wisely Indigestible deliberation at liberty flux

Please Donate to keep this Project Alive.

check out the project on GitHub



Support us by purchasing a book

Copies of the Ebook and Paperback Theo 1
(Regular edition over 8,000 words )
Theo 1

TheO 1

Copies of the Ebook Theo 2

TheO 2

Theo 2 is a massive collection words
Over 31,000 reference words
Over 5,000 Antonyms
Over 500,000 words in all


WE have now introduced TheO 2.... over 31,000 reference words and over 5,000 anthonyms. It will be available as an e book only

Current Project Objectives

Replace all references to a word that are currently referenced as See [some other word]

800 to do

Add New Words

Current stats
31,0000 Reference words
over 500,000 Total words
copyright 2018 Independent Technical Services