remain vs stay together

remain and stay together both are verbs.

Word	Noun	Adjective	Verb	Adverb
remain	No	No	Yes	No
stay together	No	No	Yes	No

As verbs, stay together is a hyponym of remain; that is, stay together is a word with a more specific, narrower meaning than remain:

Other hyponyms of remain include keep out, sit tight, stick together, stand, keep, stay fresh, be.

remain (verb)	stay together (verb)
stay the same; remain in a certain state	be loyal to one another, especially in times of trouble
be in a certain place and not leave
continue in a place, position, or situation
be left; of persons, questions, problems, results, evidence, etc.