I think fungus are more like animals. The best reason for this is their mode of nutrition i.e. they are heterotrophic. Just like animals, they can't synthesize their own food that's why they are dependent on other organisms to obtain their food. Apart from this, fungi have chitin just like animals which is not found in plants. Chitin is a polysaccharide which serves the purpose of cell wall in fungi. Just like fungi, animals belonging to arthropoda phylum of animal kingdom too have chitin layer which serves the purpose of exoskeleton on their body.