since

As adverbs the difference between over and since

is that over is thoroughly; completely; from beginning to end while since is from a specified time in the past.

As prepositions the difference between over and since

is that over is physical positioning while since is from (time).

As an adjective over

is finished; ended or concluded.

As a noun over

is a set of six legal balls bowled.

As an interjection over

is in radio communications: end of sentence, ready to receive reply.

As a conjunction since is

from the time that.

Since is a synonym of forthy.

As adverbs the difference between since and forthy

is that since is from a specified time in the past while forthy is therefore.

As conjunctions the difference between since and forthy

is that since is from the time that while forthy is because, for sake, forwhy.

As a preposition since

is from (time).