to introduce a smilar, addtional idea

also

besides

furthermore

in addition to that

additionally

moreover

too

to compare things

also

likewise

similarly

too

to introduce a contrast

however

in contrast

instead

in/by comparison

nevertheless

on the contrary

although

though

whereas

on the one hand ... and on the other hand

to introduce a cause or reason

because

since

as

because of

due to

as a result of

as a consequence of

to introduce an effect or result

as a result

therefore

thus

consequently

to conclude

all in all

in short

in conclusion

as a conclusion