Here are some examples:
* Noun: "virus" (singular masculine form)
* Adjective: "gracious" (singular masculine form)
However, it can also be used in other contexts:
* Plural nouns: In some cases, "-us" can be used in the plural form of nouns, such as "fungi" (plural of "fungus").
* Adverbs: Some adverbs end in "-us," such as "onus" (meaning "burden").
* Medical terms: "-us" is frequently used in medical terms, such as "bronchus" or "ganglion."
It's important to note that the use of "-us" can vary depending on the specific word and its origin.