What holds sentences together once they become a paragraph.

however / nevertheless

nevertheless / even so

on the other hand / in contrast

on the contrary

that said / having said that

because

since / given that

since / inasmuch as

given that

therefore / as a result

consequently

so / and so

so that / in such a way that

furthermore / in addition / besides

likewise / similarly

on the other hand / additionally

equally / in the same way

for example / for instance

that is / i.e. / in other words

specifically / concretely

in summary / to sum up

ultimately / in the end / all things considered

in short / in a nutshell

despite / even though

although / even if

despite / in spite of

first of all / in the first place

next / following this

finally

lastly / finally