An acute triangle is a right triangle, since two of its angles add up to 90 degrees.
A synonym for varied is diverse.
A synonym for temper is temperament.
Antonyms would have opposite meanings. Since huge and gigantic have very similar meanings they are synonyms.
I don't think there is a synonym for adjoined it is an antonym.
for as a conjunction - since
There really isn't a synonym of it since it is a series of words, but the best synonym I can think of would be the English translation of 'Reader beware'.
Polytheistic is the belief in many gods. But since you asked for a synonym, Irreligious? Sorry, but I can't think of others. /:
This is a Synonym since two different words meaning the same or near the same thing is a Synonym.
Antique has a synonym of obsolete. Obsolete has a synonym of outmoded. Since outmode is a transient verb it is always conjugated. But outmode is a word, it is 7 letters and it is a synonym for antique.
Since Eubacteria is a synonym for bacteria basically, E. Coli is one.
Dr. Russell's ideas have been crucial to the project since its inception.
Since... ever. Gold as a resource as well as a synonym of wealthiness has existed in Mexico since ancient times.
I don't think so, since alder is a tree. If you meant elder you could have older.
There are no synonyms for the word sixty since it is a number. This word specifies a specific number of something.
A synonym for "acquiring" is "getting" (but not necessarily buying). He was acquiring many properties but the police could not figure out how he was able to buy any of them since he was unemployed.
Upset can be either an antonym or a synonym. Flustered would be a synonym. Calm would be an antonym. Since upset can be a noun, verb or an adjective, There could three answers for each!