It is a great Scrabble word provided you are playing Scrabble in English.
(I must admit I am having a tough time playing a Scrabble-like game in English; perhaps the habit of doing the same in French)
If you like similar words as lodestar, may I suggest forenoon or fortnight? Very nice for the same purpose, and they are much nicer than their more common equivalents of "morning" and "two weeks".
And since I have forgotten to post words for a couple of days, here comes a bonus update:
Flair (pronounced "flār", if it is any help). Noun.
1) A natural talent or aptitude. A synonym would be a forte (and here I sneak a second word while still speaking of another one)
2) Having an instinctive discernment.
3) Distinctive elegance of style.
The word comes from "flairer", which means "to scent" in French (and likely in other Languages; Latin?). "Flair" is the noun based on this verb, but is only used as in the second meaning in French.