A group of words can be:
I think you are referring to what is called an "acronym." For example, the word "Scuba" (as in scuba diving) is an acronym. "Scuba" stands for Self Contained Underwater Breathing Apparatus.
"a" is one of the three words in the word group articles, along with "the" and "an".
The words for a group of islands may be a chain or an archipelago.
group
Different characters that allow one to know how to pronounce a word or group of words.
Synonyms
It means that if a word can't be understood then a group of words can never make sense
a word bank is in comprehension. it is the group of words you choose from.
Glass is the only one not on the periodic table.
management
The word "beautifully" is an adverb.
An interjection.
A definition