can you list some smaller words that are in perimeter and litre. thank you

You start -- and we'll add to your list if possible.

perimeter: meter ,merit

litre:let

i also cant figure words for decades

Those are good. How about prim, met, meet, rim? What about lit, tile, rile, tire?

You stretch your brain for decades.

decades:sad ,dad ...

That's a good start. Keep going.

Sure! In order to find smaller words within the words "perimeter" and "litre," we'll need to look for substrings or combinations of letters that form valid English words. Here are some examples:

Words within "perimeter":
1. Met
2. Peer
3. Rime
4. Timer
5. Rip

Words within "litre":
1. Lit
2. Tile
3. Tire
4. Rite
5. Tier

To find additional words, you can use an online anagram solver or word search tool, which allows you to input a word and it provides a list of possible words that can be formed using the given letters.