Guardfish's rhymes with:
swordfish's, swordfish's, flatfishes, jewfishes, pipefishes, queenfish's, swordfish's, flatfishes, jewfishes, pipefishes, queenfish's, swordfish's
swordfish's, swordfish's, flatfishes, jewfishes, pipefishes, queenfish's, swordfish's, flatfishes, jewfishes, pipefishes, queenfish's, swordfish's