verses, versus

Verses or verses is the plural ( more than one ) form of "verse", meaning a unit or stanza of a song or poem, or a division of a chapter of the Bible--
This song has three verses. Do you remember them all?
Hr forgot the verses, but remembered the refrain.
They memorize Bible verses in Sunday school.

Versus or versus means against or opposed to in a lawsuit, sports competition, or conflict--
Lawsuits in the United States are usually titled Smith v. Jones, an abbreviation of Smith versus Jones.
The seats were sold out to see the champion versus the contender.
Versus is also used to mean a choice between two alternatives--
It's pizza versus burgers--let's vote.

Now that you know that, you can say--
"He wrote several verses in honor of Ali versus Frazier, but never finished the poem.

Note--something that is written "in verse" ( two words ) is written as poetry, whether it rhymes or not--
His last play was written in verse.
Something that is written "in verses" is written in stanzas, instead of as a single unit--
The song is written in verses with a refrain between each verse.
Not to be confused with "inverse" ( one word ), meaning in reversed order or proportion, or in a relationship in which when one decreases, the other increases--
Happiness increases in inverse proportion to time spent worrying about it.
Note # 2--"averse" ( one word ) means opposed to or against--
She wanted a long engagement, but he was averse to the idea.
Not to be confused with "a verse", meaning a stanza of a song or poem--
He learned a verse of that new song, but doesn't know the rest.
Not to be confused with "aver", meaning to state firmly or to insist upon--
In court, he decided to aver that he knew nothing about it.
"Avers" is the third person singular ( he, she, it ) form of "aver"--
If he avers that he was not present, his testimony won't be of any use to us.