ew(n = noun.act) electronic warfare - military action involving the use of electromagnetic energy to determine or exploit or reduce or prevent hostile use of the electromagnetic spectrum;
is a kind of action, military action
has particulars: ecm, electronic countermeasures, eccm, electronic counter-countermeasures, electronic warfare-support measures, esm, electromagnetic intrusion

   A yew. Chaucer. [1913 Webster]

   tumour(n = noun.state) neoplasm, tumor - an abnormal new mass of tissue that serves no purpose;
is a kind of growth
has particulars: acanthoma, skin tumor, angioma, benign tumor, benign tumour, nonmalignant neoplasm, nonmalignant tumor, nonmalignant tumour, blastocytoma, blastoma, embryonal carcinosarcoma, brain tumor, brain tumour, carcinoid, celioma, granuloma, adipose tumor, lipoma, malignant neoplasm, malignant tumor, metastatic tumor, meningioma, neurilemoma, neurofibroma, neuroma, phaeochromocytoma, pheochromocytoma, pinealoma, plasmacytoma, psammoma, sand tumor, teratoma

tumour, n. (US tumor) a swelling, esp. from an abnormal growth of tissue.

Derivative:
tumorous adj.

Etymology:
L tumor f. tumere swell

N  convexity, prominence, projection, swelling, gibbosity, bilge, bulge, protuberance, protrusion, camber, cahot, thank-ye-ma'am, swell, intumescence, tumour, tumor, tubercle, tuberosity, excrescence, hump, hunch, bunch, boss, embossment, hub, hubble, tooth, knob, elbow, process, apophysis, condyle, bulb, node, nodule, nodosity, tongue, dorsum, bump, clump, sugar loaf, bow, mamelon, molar, belly, corporation, pot belly, gut, withers, back, shoulder, lip, flange, pimple, zit, wen, wheel, papula, pustule, pock, proud flesh, growth, sarcoma, caruncle, corn, wart, pappiloma, furuncle, polypus, fungus, fungosity, exostosis, bleb, blister, blain, boil, airbubble, blob, papule, verruca, papilla, nipple, teat, tit, titty, boob, knocker, pap, breast, dug, mammilla, proboscis, nose, neb, beak, snout, nozzle, schnoz, peg, button, stud, ridge, rib, jutty, trunnion, snag, cupola, dome, arch, balcony, eaves, pilaster, relief, relievo, cameo, bassorilievo, mezzorilevo, altorivievo, low relief, bas relief, high relief, hill, cape, promontory, mull, forehead, foreland, point of land, mole, jetty, hummock, ledge, spur, naze, ness, convex, prominent, protuberant, projecting, bossed, embossed, bossy, nodular, bunchy, clavate, clavated, claviform, hummocky, moutonne, mammiliform, papulous, papilose, hemispheric, bulbous, bowed, arched, bold, bellied, tuberous, tuberculous, tumous, cornute, odontoid, lentiform, lenticular, gibbous, club shaped, hubby, hubbly, knobby, papillose, saddle-shaped, selliform, subclavate, torose, ventricose, verrucose, salient, in relief, raised, repousse, bloated, (expanded).

benign tumour, brain tumour, ewing's tumour, nonmalignant tumour, papillary tumour, tumour necrosis factor, wilms tumour