"Umbrellalike" is a unique word that describes anything that resembles or functions similarly to an umbrella. If you're looking for synonyms to expand your vocabulary, you can use words like "canopy", "parasol", "sunshade", "awning", or "tarpaulin" to describe something that provides shelter or protection from the elements. You can also use "umbrella-shaped", "dome-like", "bell-shaped", or "circular" to describe something that takes on the form of an umbrella. No matter which synonym you choose, you can confidently use it to describe something that is similar to the classic, everyday umbrella that we all use to stay dry during rainy days.