As nouns the difference between terms and heptangle
is that terms is while heptangle is (occult) a seven-pointed star with the construction lines retained.
terms
English
Noun
(head)
Statistics
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heptangle
English
Noun
(
en noun)
(occult) A seven-pointed star with the construction lines retained.
A heptagram (seven-pointed star inscribed in a circle).
(rare) A heptagon.