Теплиця тепла.

In Ukrainian, the verb to be is usually omitted in the present tense.

So:

• Теплиця тепла. = The greenhouse is warm.

Literally, it is just greenhouse warm.

This is very normal in Ukrainian. If you want to talk about the past or future, then forms of бути (to be) appear:

• Теплиця була тепла. = The greenhouse was warm.
• Теплиця буде тепла. = The greenhouse will be warm.

Because теплиця is a feminine singular noun, and the adjective must agree with it in gender, number, and case.

• теплиця = feminine singular
• so the adjective must also be feminine singular nominative:
  • тепла

The dictionary form of the adjective is usually the masculine form:

• теплий = warm

But it changes:

• теплий — masculine
• тепла — feminine
• тепле — neuter
• теплі — plural

So:

• теплий будинок = a warm house
• тепла теплиця = a warm greenhouse

It is in the nominative case.

In this sentence, теплиця is the subject:

• Теплиця = the greenhouse

And тепла is a predicate adjective describing it.

So both words are in forms that match a nominative singular feminine structure.

Here, тепла is an adjective used as a predicate adjective.

That means it is not directly placed before the noun like in:

• тепла теплиця = a warm greenhouse

Instead, it comes after the noun and functions like:

• The greenhouse is warm.

So in Теплиця тепла, тепла is still an adjective, but it is being used to say something about the subject.

Yes, Ukrainian word order is fairly flexible, but the most neutral version here is:

• Теплиця тепла.

You could also say:

• Тепла теплиця.

But that usually sounds more like a warm greenhouse rather than a full sentence, unless the context makes it clear.

If you want a clear complete sentence meaning The greenhouse is warm, the given order is the safest and most natural basic choice.

Yes, they are related historically and by root.

They both come from the idea of warmth/heat:

• тепло = warmth / it is warm
• теплий = warm
• теплиця = greenhouse

So for an English speaker, it may help to notice that теплиця is connected to the same root as теплий.

In most normal contexts, Теплиця тепла simply means:

• The greenhouse is warm.

That is the standard way to understand it.

Ukrainian often uses this simple noun + adjective pattern to describe a state or quality of something.

If the speaker wanted to say a warm greenhouse as just a noun phrase, the usual form would be:

• тепла теплиця

So the word order helps you interpret it.

Yes, and that is a very common alternative, but it means something slightly different in structure.

• Теплиця тепла. = The greenhouse is warm.
• У теплиці тепло. = It is warm in the greenhouse.

The first sentence describes the greenhouse with an adjective. The second sentence describes the situation/location using тепло.

Both can be natural, but they are built differently.

Теплиця is a noun.

More specifically, it is:

• feminine
• singular
• nominative in this sentence

Its ending -я is one common clue that a noun is feminine, though you should not rely on endings alone in every case.

Yes, absolutely.

Even though it has only two words, Теплиця тепла. is a complete, correct sentence in Ukrainian.

It has:

• a subject: теплиця
• a description/predicate: тепла

Because present-tense is is usually omitted, nothing is missing.