The term 'REALLY TIRED' can be described by five different crossword solutions: WIPED (5 letters), BEAT (4 letters), DONEIN (6 letters), DRAINED (7 letters), and PLUMTUCKEREDOUT (15 letters). Wiped implies a feeling of exhaustion, as if all energy has been wiped away. BEAT is another way of saying exhausted, as if one has been beaten down by fatigue. Donein is a slang term for being worn out or tired. DRAINED implies that all energy has been taken away, leaving one feeling empty. Finally, plumtuckeredout is an old-fashioned phrase meaning completely exhausted. All of these words describe the feeling of being really tired.