1) Addled 2) Amazed 3) A sea 4) At sea 5) Baffled 6) Bewildered 7) Confused 8) Consarned 9) Dadblamed 10) Damn 11) Darned 12) Dratted 13) Goshdarn 14) Got 15) Mazed 16) Overwhelmed 17) Perplexed 18) Puzzled 19) Stumped 1) At sea 2) Baffled 3) Befuddled 4) Bemused 5) Bewildered 6) Confused 7) Filled with bewilderment 8) Lost 9) Mazed 10) Mixed-up 11) Perplexed 
• (a.) Confused; perplexed. • (a.) Excessive; extreme; abominable. • (imp. & p. p.) of Confound
When the effects of two or more factors cannot be separated, e.g. a study recruiting old men and young women confounds age and gender effect. A well-designed study should seek to minimise such effects.
Con·found'ed adjective 1. Confused; perplexed. « A cloudy and confounded philosopher. Cudworth. » 2. Excessive; extreme; abominable. [ Colloq.] « He was a most confounded tory. Swift. » « The tongue of that confounde...
Confounded is slang for odious, unpleasant.
confounded 1. Confused or perplexed; having caused the inability to think clearly: 'These questions even confused the professors.' 2. Having mistaken one thing for another, confused.
bewildered; confused; perplexed. · damned (used euphemistically): That is a confounded lie.