Thesaurus

Synonyms for Sickly include:

afflicted, aguish, ailing, air sick, airsick, angry, arthritic, asthmatic, autistic, bad, bedfast, bedrid, bedridden, bilious, blebby, blistery, bloated, bloodshot, bronchitic, cankerous, carbuncled, carbuncular, carious, carsick, caseous, chilblained, colicky, consumptive, convalescent, creaky, cytomegalic, dehydrated, delirious, diabetic, diseased, distended, dizzy, dropsical, dyspeptic, edematous, enlarged, faint, feverish, feverous, flatulent, foaming, foamy, frail, frothing, funny, gangrenous, gassy, giddy, gouty, green, hallucinating, icteric, ill, indisposed, inflamed, inflammatory, ingrowing, ingrown, intumescent, jaundiced, laid low, laid up, light, light-headed, lightheaded, liverish, livery, membrane-forming, membranous, mental, milk-sick, morbid, mortified, nauseated, nauseous, palsied, paralytic, paralyzed, paraplegic, pathologic, pathological, peaked, poorly, pro-inflammatory, proinflammatory, puffed, puffy, queasy, rachitic, recovering, rheumatic, rheumatoid, rheumy, rickety, sallow, scrofulous, seasick, seedy, sick, sick-abed, sickish, sickly, sneezy, sore-eyed, spastic, stricken, sunburned, sunburnt, swollen, swooning, tubercular, tuberculous, tumescent, tumid, turgid, ulcerated, ulcerous, under the weather, unfit, unhealed, unhealthy, unsound, unwell, unwholesome, upset, varicose, vertiginous, wheezing, wheezy, windburned, windburnt, woozy, yellow

sickly is a ADJ.