Keyword
What KeyWord is found in the definitions of each of the following?

513 pounce, fountain, May Day, vernal, Igor Stravinsky (6 letters)
514 Hebe, bound, clipboard, geyser, trampoline (6 letters)
515 pen, ink sac, calamari, cephalopod, dibranchiate (5 letters)
516 caduceus, alpenstock, crosier, mace, walking stick (5 letters)
517 exeunt, mise en scene, prepupa, proscenia, gradation (5 letters)
518 nova, Procyon, astral, headliner, visual binary (4 letters)
519 sauna, stoker, calliope, solfatara, water hammer (5 letters)
520 hush, becalm, airless, impassive, quiescent (5 letters)
521 cardia, rennet, gastrotomy, collywobbles, tripe (7 letters)
522 anode, wareroom, cryobank, fat cell, glove compartment (7 letters)
523 flaw, haboob, trysail, northeaster, Flying Dutchman (5 letters)
524 rectus, beeline, linear, schuss, virgate (8 letters)
525 minimax, cover-up, diversion, board game, full-court press (8 letters)
526 emphasis, hot seat, burnout, battle fatigue, breaking point (6 letters)
527 adamant, obdurate, headstrong, pertinacious, pigheaded (8 letters)
528 wonk, aggie, letterman, pupillary, undergraduate (7 letters)
529 caramel, Benedict's test, saccharine, candied, xylose (5 letters)
530 syzygy, Nippon, coronagraph, Phoebus, heliocentric (3 letters)
531 stay, Atlas, fulcrum, foundation, sustentacular (7 letters)
532 marvel, ambush, unawares, camisado, Pearl Harbor (8 letters)

Answers: 513. spring, 514. spring, 515. squid, 516. staff, 517. stage, 518. star, 519. steam, 520. still, 521. stomach, 522. storage, 523. storm, 524. straight, 525. strategy, 526. stress, 527. stubborn, 528. student, 529. sugar, 530. sun, 531. support, 532. surprise,

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