concentric circles

ally (a nation united to another by treaty or league)

aneurysm (abnormal blood-filled swelling)

to live together

climate change

(linguistics) cognate (word), paronym

a chain with a weight on one or both ends, such as might be used on a pulley to help lift loads / (weaponry) a Japanese martial arts chain weapon, consisting of or based on such a weighted chain

(weaponry, uncommon) a black-lacquered archery bow wrapped in strips of rattan

a tardigrade; a water bear

diesel powered train