✅ Must refers to something that is necessary (A good knowledge of anatomy is a must if you want to draw figures).

✅ Requisite refers to something that is necessary for a particular purpose or profession (I fulfilled the requisites of education and training).

✅ Both of these words refer to necessary and indispensable things.

✅ Must is more of an informal slang term. Requisite is more formal. Often, musts are less necessary than requisites.

✅ Trim means to add decorative elements to something (I trimmed the dress with fur; We trimmed the tree).

✅ Adorn means to decorate something with ornaments such as flowers or gems (Her hair was adorned with flowers; We adorned the dull plant pot with stick-on gems).

✅ Adorn can also be a more general term (His poetry was adorned with beautiful imagery).

✅ Thread refers to a fine spun cord, made from any fiber, which can be used in sewing (I used silk thread in my embroidery).

✅ Floss refers to a gently spun cord that can be used in embroidery or sewing (Three strands of floss would be enough).

✅ Both of these terms refer to fine spun fiber, but floss can refer to any fine fibrous material, like fiber from the silk-cotton tree, corn silk, or dental floss (I bought more floss this morning; I picked the floss off the corn).