[25]
481. rancor ransom
482. raise raisin
483. resort retort
484. repel repeal
485. resource recourse
486. recent resent
487. reckon beckon
488. require acquire inquire enquire
489. revere reverse
490. rip ripe
491. rout route
492. rude crude
493. saucer source sauce
494. salient saline
495. scar scare scars
496. sculpture scripture
497. session cessation
498. sever severe
499. seven sever
500. site cite
[26]
501. sister sinister
502. slag slug snag
503. slender slander
504. slot slut
505. spheroidal spherical
506. spice specie species
507. spouse espouse
508. spy espy
509. stigma astigma
510. strike stick
511. strive stride
512. strip stripe
513. story storey
514. store stone atone
515. stationery stationary
516. state statue statute stature status
517. soda coda
518. sour sore
519. suburb suborn
520. surfer sulfur
[27]
521. subside subsidize
522. succession secession
523. suit suite
524. sweet sweat
525. tax taxi
526. tamper tempter
527. thrash thresh
528. thumb thump
529. though thought thorough through trough
530. tooth booth
531. truth truce
532. turkey turnkey
533. turbulent truculent
534. tune tuna
535. union onion
536. value valve
537. vanish varnish
538. verifiable veritable
539. venerable verncerable
540. via vie
[28]
541. vocation avocation vacation evocation revocation
542. wrath wraith
543. wave waive
544. wench wrench
545. which witch
546. whisker whisper
547. window widow
548. wince rince
549. wile wilt wily
550. woof wolf
551. yarn yam
552. year yearn
553. yearling yeanling
554. yoke yokel yolk
555. zoo zoon