haka

As a noun haka

is carbon monoxide.

As a proper noun haya is

.

As a noun haka

is carbon monoxide.

As a numeral hake is

(l).

As nouns the difference between haha and haka

is that haha is type of boundary to a garden, pleasure-ground, or park, designed not to interrupt the view and to be invisible until closely approached while haka is carbon monoxide.

As an interjection haha

is an onomatopoeic representation of laughter.

As nouns the difference between haka and hakea

is that haka is a traditional dance of New Zealand's Maori people while hakea is a shrub of the genus genus: Hakea.