Easy, facile, simple, light, effortless, smooth are comparable when meaning not involving undue effort or difficulty (as in doing, making, giving, or understanding).
Earthly vs Terrestrial vs Earthy vs Mundane vs Worldly vs Sublunary
Earthly, terrestrial, earthy, mundane, worldly, sublunary are comparable when they mean of, belonging to, or characteristic of the earth.
Earth vs World vs Universe vs Cosmos vs Macrocosm
Earth, world, universe, cosmos, macrocosm are comparable when they mean the entire area or extent of space in which man thinks of himself and of his fellow men as living and acting.
Eager vs Avid vs Keen vs Anxious vs Agog vs Athirst
Eager, avid, keen, anxious, agog, athirst mean actuated by a strong and urgent desire or interest.
Each vs Apiece vs Severally vs Individually vs Respectively
Each, apiece, severally, individually, respectively are comparable when they refer to every one of the many or several persons or things comprising a group. All imply distribution.
Dwarf vs Pygmy vs Midget vs Manikin vs Homunculus vs Runt
Dwarf, pygmy, midget, manikin, homunculus, runt are comparable when they mean an individual and usually a person of diminutive size.
Dupe vs Gull vs Befool vs Trick vs Hoax vs Hoodwink vs Bamboozle
Dupe, gull, befool, trick, hoax, hoodwink, bamboozle mean to delude a person by underhand means or for one’s own ends.
Dumb vs Mute vs Speechless vs Inarticulate
Dumb, mute, speechless, inarticulate mean lacking the power to speak.
Dull vs Humdrum vs Dreary vs Monotonous vs Pedestrian vs Stodgy
Dull, humdrum, dreary, monotonous, pedestrian, stodgy mean so unvaried and uninteresting as to provoke boredom or tedium.
Dull vs Blunt vs Obtuse
Dull, blunt, obtuse are comparable when they mean the reverse of sharp, keen, and acute.
Due vs Desert vs Merit
Due, desert, merit are comparable when they mean what is justly owed to a person (sometimes a thing), especially as a recompense or compensation.
Due vs Rightful vs Condign
Due, rightful, condign are comparable when they mean being in accordance with what is just and appropriate.