These are compound words ending in worm: glowworm, -hookworm, ringworm, tapeworm and bookworm.
Card Worm Butter Foot Cup Ball Snow Earth Post Board:ButtercupEarthwormFootballPostcardSnowboard
Yes, silkworm (silk+worm) is a compound word.
Yes, glowworm (glow+worm) is a compound word.
earthworm inchworm glowworm
compound words
Yes, into and today are compound words.
Compound words that have when in them are whence, whenever, and whensoever.
No, if they are separate words they are not compound.
Book Bookmark Bookshelf Bookepper Bookworm
compound words written as two
Some compound words that have "oil" in them are: oilcloth, oilrig, oilcan, oilskin.
Compound words can be made with almost any two words.