I'd go with 'ultimate'. penultimate means the one right before the end.
The adjective form of end is ending.
No, it is not an adjective. It is an adverb. Note the -ly at the end.
No.
Yes, if you are using the phrase as an attributive adjective: 'She arranged the dominos on the table in an end-to-end pattern.' No, if you are using it as a predicative adjective or an adverb: 'The pattern that she chose for the arrangement was end to end.' 'She laid the dominos out on the table end to end.'
Acceptable. If an abstract noun ends in -ability or -ibility, the corresponding adjective will end in -able or -ible.
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Well, honey, the word "end" in that sentence is a noun. It's the object of the preposition "till." So, in this case, "end" is just sitting there looking pretty as a noun, doing its job in the sentence.
It is an adjective (without end, or tediously long). The adverb form is endlessly.
The best way to derive an adverb from a noun is to first change the noun to an adjective, and then convert that adjective to an adverb, usually by adding "ly" at the end. For example, in this case, we can derive the adjective "secure" from the noun "security," and then add "ly" at the end of this adjective to make it an adverb. So, you end up with the word "securely."
The noun form of the adjective "long" is "length." Length refers to the measurement of something from end to end or the extent of something in time or space.
The usual way - remove the ly from the end. The adjective is unfortunate as in an unfortunate accident
"Far" can be used as an adjective or an adverb. It was at the far end of the room. He traveled far.