The first ones are ARCANUM.
6 letter words
ACUMEN, APERCU, ARCANE, CAMERA, CAMPER, CANAPE, CARMAN, CARMEN, ENCAMP, MANURE, PNEUMA, PRANCE, PREMAN, PURANA.
The second ones are SNAPWEEDS.
8 letter words
ANSWERED, ASPERSED, DEARNESS, PREDAWNS, REPASSED, RESPADES, SNAPWEED, SPAWNERS, SPENDERS.
The third ones are HANGED.
5 letter words
AGENE, HEDGE, HENGE.
The fourth ones are 9 letter words
CASIMERES, CASSIMERE, CROSSBEAM, ISOMERASE, SMIERCASE.
8 letter words
AEROBICS, AMBERIES, ASCRIBES, BECRIMES, BESMEARS, BIRAMOSE, BOREASES, CASIMERE, CRAMBOES, EMBOSSER, EMBRACES, ISOBARES, MICROBES, RACEMOSE, SCARIOSE, SERIEMAS.
