Assuming you are looking to make words in English, most words in the English language require a vowel to be spelt correctly. Vowels are either A, E, I, O and U. Seeing as there is only one vowel, which is A, in this collection of letters this limits the amount of words you will be able to come up with. However there are a number of short 2, 3 and 4 letter words which can be constructed from this range and it is actually quite interesting to see how many words you can spell with just the one vowel.
If there are no limitations on the number of letters you can use, the following words would work and here are the 21 words which have been written using the letters you have been provided with.
Slap, slaps, lap, laps, pal, pals, pass, lass, ass, spa, spas, sap, saps, lash, alp, alps, la, has and finally ash.
There are a number of slang words which you may be able to come up with but it all depends on the rules of the game you are playing. A game such as Scrabble for example would not allow the use of slang words as they have to appear in the dictionary.
If there are no limitations on the number of letters you can use, the following words would work and here are the 21 words which have been written using the letters you have been provided with.
Slap, slaps, lap, laps, pal, pals, pass, lass, ass, spa, spas, sap, saps, lash, alp, alps, la, has and finally ash.
There are a number of slang words which you may be able to come up with but it all depends on the rules of the game you are playing. A game such as Scrabble for example would not allow the use of slang words as they have to appear in the dictionary.