10-Letter Words Starting TH & Ending S

• an organism that has the characteristics of a more primitive type of that organism

• a reappearance of an earlier characteristic

• characteristic of an atavist

• Australian and southeastern Asian birds with a melodious whistling call

• A lymphocyte, produced in the thymus, that develops into a T cell

• hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells

• a tack for attaching papers to a bulletin board or drawing board

• fasten with thumbtacks

• (sometimes offensive) a homeless boy who has been abandoned and roams the streets

• an advertisement (usually printed on a page or in a leaflet) intended for wide distribution

• words spoken in a casual way with conscious under-emphasis

• thrown away

• intended to be thrown away after use

• someone who theorizes (especially in science or art)

• Any animal with a thorny back, especially marine animals, such as:

• A woman over a certain age (variously 26 or 30) who has never married, older than a spinster.

• A folded membrane within plant chloroplasts from which grana are made, used in photosynthesis

• the hole in a woodwind that is closed and opened with the thumb

• a finger hole made to fit the thumb (as in a bowling ball)