Homophones are words that sound alike, may have the same spelling, but differ in meaning.
Decent means polite, honest, respectable, civilized, etc.
Descent means fall, decline, drop, plunge, crash, origin, lineage, etc.
Dissent means to disagree, differ, oppose, rebel, etc.
Please help me to find a decent home.
He is from a decent family.
The aircraft made a steep descent.
That lady is of Irish descent.
A few Board members dissented from the majority on the new project.