What kind of spider looks like a bid swollen up tick?

The spider that resembles a swollen tick is likely the funnel-web spider, particularly species like the funnel weaver. These Spiders have a rounded, bulbous abdomen that can give them a tick-like appearance. Additionally, some orb-weaver spiders may also appear similar due to their large, rounded bodies. However, it's essential to note that while they may look alike, spiders and ticks belong to different biological classes.