Just by looking at this question one can see, that a great part of it can be answered by a small google search and some intensive thinking.
Is there an etymological connection between these two words["freuen", "froh"] that share a similar meaning? And also, do they share the same meaning?
Reading through this I thought to myself: these words have a similar meaning and they look somewhat similar, the logical comclusion is: they are derived from the same word originally.
Now as @elena posted a comment concerning research effort and nothing happened for 2 Hours, I decided to apply a close vote, as this question obviously did not show prior research effort whatsoever. This does not mean there was none, OP clearly stated "[the words] share a similar meaning", which means he at least looked them up in a dictionary, but no mention of that.
Thus I navigated to the Off-Topic close reasons and to my surprise found the following wording:
Questions asking for translations[sic] are off-topic [...]
Why do we restrict ourselves to translation requests only? Why not instead have following close-reason:
Questions that are not clearly indicating prior research effort are off-topic.[...]