Cognates are words from two languages that are the same or similar. Knowing the rules of cognates will help you learn and deduct words for its use in Spanish
Words that end in –ous change to –oso
Spanish words that end in -oso tend to be adjectives. In English we can often change a noun into its corresponding adjective by adding -ous e.g advantage/advantageous, harmony/harmonious, space/spacious. You can often also do this in Spanish with -oso e.g peligro (danger)/peligroso (dangerous), lujo (luxury)/lujoso (luxurious).