Add sneakily, 6 letters
Add surreptitiously, 6 letters
Enter secretly, 6 letters
Enter unnoticed, 6 letters
Enter without being noticed, 6 letters
Mention casually, 6 letters
Enter undetected, 13 letters
Don, 8 letters
Don quickly, 8 letters
Don, as something more comfortable, 8 letters
Enter furtively, 8 letters
Enter on the sly, 8 letters
Enter quietly, 8 letters
Put on something more comfortable, 8 letters
Put on, as pajamas, 8 letters
Put on, like lingerie, 8 letters