Redback spiders are venomous arachnids commonly found in Australia. When referring to these spiders, other words or synonyms to describe them could include: 1. Australian redback 2. Redbacked spider 3. Latrodectus hasseltii (scientific name) 4. Poisonous redback 5. Dangerous spider 6. Red-striped spider 7. Red-spotted spider 8. Red-bellied spider 9. Red hourglass spider 10. Red venom spider It's essential to note that even though they have many synonyms or names, these spiders remain perilous and should be avoided. If you spot an Australian redback spider in your home, it's crucial to handle the situation carefully by seeking professional pest control services.