underway

As nouns the difference between underlay and underway

is that underlay is a layer (of earth, etc) that lies under another; substratum while underway is a road, track, path, or street for going under another way or obstacle.

As a verb underlay

is (underlie) or underlay can be to lay (something) underneath something else; to put under.

As an adverb underway is

in motion, in progress; being done or carried out.

As adverbs the difference between underway and away

is that underway is in motion, in progress; being done or carried out while away is from a place,.

As a noun underway

is a road, track, path, or street for going under another way or obstacle.

As an interjection away is

(northern england) come on!; go on!.

As an adjective away is

not here, gone, absent, unavailable, traveling; on vacation or away can be .

Goingon is likely misspelled.

Goingon has no English definition.

As a noun underway

is a road, track, path, or street for going under another way or obstacle.

As an adverb underway

is in motion, in progress; being done or carried out.

As nouns the difference between happen and underway

is that happen is morsel while underway is a road, track, path, or street for going under another way or obstacle.

As an adverb underway is

in motion, in progress; being done or carried out.