As an adjective uncool

is (slang) not in accord with the current fashion, standards or mores of a particular group; not cool.

As an adverb uncoolly is

in an uncool way.

As an adjective unsexy

is not sexy.

As an adverb unsexily is

in an unsexy way.

Geekily is a synonym of nerdily.

As adverbs the difference between geekily and nerdily

is that geekily is in a way or to an extent that is geeky while nerdily is in a nerdy way.

As nouns the difference between subtropical and gesneriad

is that subtropical is a subtropical plant while gesneriad is (botany) any of the family gesneriaceae of tropical and subtropical flowering plants, valued as ornamentals.

As an adjective subtropical

is pertaining to the regions of the earth further from the equator than the tropical regions.

As nouns the difference between ornamental and gesneriad

is that ornamental is an ornamental plant while gesneriad is (botany) any of the family gesneriaceae of tropical and subtropical flowering plants, valued as ornamentals.

As an adjective ornamental

is serving to ornament; characterized by ornament; beautifying; embellishing.

As verbs the difference between separate and unmix

is that separate is to divide (a thing) into separate parts while unmix is (informal) to separate the components of a mixture.

As an adjective separate

is apart from (the rest); not connected to or attached to (anything else).

As a noun separate

is (usually|in the plural) anything that is sold by itself, especially an article of clothing.

As a noun mixture

is the act of mixing.

As a verb unmix is

(informal) to separate the components of a mixture.

As verbs the difference between dismiss and undream

is that dismiss is (senseid)(lb) to discharge; to end the employment or service of while undream is to dismiss from the imagination as though never dreamed.

As a noun imagination

is imagination (image-making power of the mind).

As a verb undream is

to dismiss from the imagination as though never dreamed.

As verbs the difference between dream and undream

is that dream is (lb) to see imaginary events in one's mind while sleeping while undream is to dismiss from the imagination as though never dreamed.

As a noun dream

is imaginary events seen in the mind while sleeping.