gem — a cut and polished precious stone or pearl fine enough for use in jewelry.
hem — to fold back and sew down the edge of (cloth, a garment, etc.); form an edge or border on or around.
them — male (usually used in combination): a he-goat.
Two-syllable rhymes
item — a separate article or particular: 50 items on the list.
wisdom — the quality or state of being wise; knowledge of what is true or right coupled with just judgment as to action; sagacity, discernment, or insight.
Three-syllable rhymes
tiara — a jeweled, ornamental coronet worn by women.
violent — acting with or characterized by uncontrolled, strong, rough force: a violent earthquake.