1. There's no word to explain it. = Correct. There is not one single word to explain it. 2. There's no words to explain it. = This one is tricky. There's is a contraction for 'There is'. There is no words to explain it. This is incorrect grammar as it should be: There ARE no words to explain it. However... and this is where it gets tricky.. you will often hear people substitute There's when grammar calls for There are.. Ex: There's reasons for my madness! There's five people in the bathroom! Technically, the second sentence is incorrect. I advise you to learn it as "there are no words to explain it", however, you will hear 'there's' misused---- a lot. There's just some weird English things that you have to accept! ----please note this pertains to American English. The Brits are writhing in pain right now.

Ha, put my answer in the wrong place. Sorry for the duplicate. The first one is correct, though you'll hear native speakers saying the second one a lot. Grammatically, the second sentence should be "There are no words to explain it."

The first one, though you'll hear native speakers saying the second one a lot. Grammatically, the second sentence should be "There are no words to explain it."