Solutions Relating to an animal having no backbone has 8 entries with similar clues

• 4-letter words
• slugAn animal without a backbone
• 5-letter words
• squidAn animal without a backbone
• snailAn animal without a backbone
• 6-letter words
• spinalRelating to the backbone
• 7-letter words
• musselsAn animal without a backbone
• 10-letter words
• vertebrateHaving a backbone
• 11-letter words
• vertebratesAnimals with backbone
• 13-letter words
• invertebratesAnimals without backbone