frivolous, playful

serous, severe, minor, gravest, grievous, nonserious, genuine, significant, substantial, obvious, trivial, troubling, worrisome, persistent, dire, dangerous, threatening, vexing, substantive, remediable, catastrophic, definite, major, credible, acute, profound, urgent, mild, critical, debilitating, superficial, widespread, real, fixable, nasty, frightening, fatal, legitimate, terrible, irreparable, minimal, devastating, horrendous, containable, drastic, systemic, aggravating, weighty, concerned, intractable, sustained, aware, scary, knottier, forthright, realistic, troublesome, daunting, regrettable, forceful, fundamental, bona fide, blunt, distressing, chronic, surmountable, psychotic depression, rare, slightest, violent, avoidable, unfortunate, horrific, solvable, damaging, clear, immediate, alarming, irreversible, apparent, silly, longterm, embarrassing, unavoidable, disturbing, worthy, trifling, vigorous, straightforward, problematic, careful, considerable, lingering, irresolvable, cognizant, reparable, painful, unintentional, lighthearted, sobering, intolerable, deadly, active, beautiful, great, popular, quick, successful, familiar, important, long, perfect, positive, sensitive, useful, accusatory, animate, aristotelian, arousing, bad, basic, bodily, grave, graver, preventable, baffling, iatrogenic, perplexing

., abdominal actinomycosis, acquired immune deficiency syndrome, addle-head, addlehead, aedes albopictus, aficionado, aids, aleppa grass, amiodarone, amitriptyline, amitriptyline hydrochloride, anticlimax, application, asian tiger mosquito, as a formality, bacillary white diarrhea, bacillary white diarrhoea, badly, bathos, bemisia tabaci, bid, biosafety level 3, birch leaf miner, birdbrain, blue mold fungus, blunder, boob, brown rat, brown snail, bull, bumper, bust-up, butterfly, caltrop, capital offense, chamber music, chat up, childbed fever, chloramphenicol, chloromycetin, cipro, ciprofloxacin, close supporting fire, complication, composition, conference, contemplativeness, contracting, coquet, coquette, cordarone, corn borer, coronary care unit, court-martial, crash, criminal, criticism, critique, crohn's disease, cryonics, dabble, dabbler, dally, debilitation, deep water, devil's weed, dilettante, dishonor, divide, divine, earnestly, earnestness, elavil, enervation, enfeeblement, enteric fever, evergreen millet, exhaustion, extenuation, facer, fat embolism, felony, fenusa pusilla, flip, flirt, forest tent caterpillar, fractured, frivolity, frivolous, frivolousness, genus eimeria, get, gipsy moth, goof, grave, gravely, graveness, gravity, green monkey disease, grievous, group discussion, had crime, hard news, heavy, helix aspersa, hudood, hudud, hypervitaminosis, indicate, infantile autism, infraction, infringement, in any event, in earnest, in troublep, japanese beetle, joke, lack, lead, lead-in, lepromatous leprosy, light, limitation, live, lockjaw, loon, lymantria dispar, malacosoma disstria, marburg disease, marburg hemorrhagic fever, mash, material breach, means grass, meditativeness, mental disease, mental illness, migratory grasshopper, minded, misdemeanor, misdemeanour, mitigation, myxosporidian, norway rat, offence, offense, overserious, palliation, panonychus ulmi, pensiveness, perfunctorily, peronospora tabacina, philander, pink disease, plague, play around, plea bargain, plea bargaining, poinsettia strain, police court, popillia japonica, posttraumatic stress disorder, pro forma, psychopathy, ptsd, puerperal fever, pullorum disease, pyrausta nubilalis, question, rattus norvegicus, red spider, red spider mite, regional enteritis, regional ileitis, ribavirin, riot gun, romance, san andreas fault, sciolist, separatism, seriocomedy, seriocomic, seriocomical, serious-mindedness, seriously, seriousness, severely, sin, sincerity, smash, smash-up, smatter, sobering, soberness, sobersides, sobriety, soft news, somberness, sorghum halapense, sorghum halepense, special court-martial, straight face, superbug, teratology, tetanus, thoracic actinomycosis, toxic shock, toxic shock syndrome, toxoplasmosis, tragicomedy, translocation, transparent gem, tribulus terestris, tss, typhoid, typhoid fever, ulcerative colitis, unemployment, unimpressed, violation, virazole, weightily, weighty, whammy, wreck

difficult, earnest, good, hard, intellectual, of import, sedate, sensible, sincere, sober, solemn, thoughtful, unplayful