BE A BETTER ANAGRAMMER X

1. The words AUTISM, MATURE, RADIUM, and TRAUMA are all spelled one-letter-off from the same word. What is the word?

2. The words AROUND, ONWARD, ORPHAN, and  RANDOM are all spelled one-letter off from the same word. What is the word?

Answers:

1. ATRIUM
2. PARDON

Credit:
Joseph Appel