plug button vs hole plug

plug button and hole plug both are nouns.

Word	Noun	Adjective	Verb	Adverb
plug button	Yes	No	No	No
hole plug	Yes	No	No	No

As nouns, plug button and hole plug are synonyms defined as:

plug button and hole plug: A small, flat plug made of plastic, metal or wood, used to cover holes and visible screws in furniture.

plug button (noun)	hole plug (noun)
A small, flat plug made of plastic, metal or wood, used to cover holes and visible screws in furniture.	A small, flat plug made of plastic, metal or wood, used to cover holes and visible screws in furniture.