4 word combinations from a short list of words

Using a list of 1500 common nouns, I need to try all combinations of exactly four nouns and their plurals (add s) to crack an MD5. 

wordlist:

fruit
apple
pear
banana
turkey
tree
photo
plant


example passwords

fruitsapplepearbanana


turkeytreesphotoplant

no capitals, so spaces.

I've looked around, but can only figure out how to do combine two.

Any pointers?