sinical

As adjectives the difference between bitter and sinical

is that bitter is having an acrid taste (usually from a basic substance) while sinical is (dated|mathematics) of, relating to, or constructed using sines.

As a noun bitter

is (usually in the plural bitters) a liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic.

As a verb bitter

is to make bitter.

As adjectives the difference between skeptical and sinical

is that skeptical is having, or expressing doubt; questioning while sinical is (dated|mathematics) of, relating to, or constructed using sines.

As adjectives the difference between finical and sinical

is that finical is finicky, fastidious, overly precise or delicate while sinical is (dated|mathematics) of, relating to, or constructed using sines.